The cup that refills
सोम · अमावास्या · शश · षोडशी कला
No object in the Sanskrit corpus is watched as continuously as the moon. It is the calendar's engine (the drift essay turned on where its stations stood), the eclipse's victim (the shadow essay ended inside its geometry) — but it is also a thing the texts kept accounts OF: a cup the gods drink down and which refills, a name explained by where the moon spends its missing night, an arithmetic of sixteen parts with one that never empties, a waiting-room for the dead, and at last a mirror in which the earth itself is seen. This essay reads that ledger from the Ṛgveda to the astronomers, one verbatim quote per entry.
Every quote is a slice from Jñānakośa, the research database behind this atlas; each links to its revision-pinned source page. Translations are literal renderings; dates are approximate spans of compilation. Display markup of the e-texts is removed here; the full text, apparatus and confidence grades are one click away.
Two Somas, and the drink that returns
सोम · the god among the stars
In the Puruṣa cosmogony the moon has the strangest birth of any luminary: not from the eye, like the sun, but from the mind —
Ṛgveda 10.90.13 · c. 12th c. BCE or earlier
चन्द्रमा मनसो जातश्चक्षोः सूर्यो अजायत ।
मुखादिन्द्रश्चाग्निश्च प्राणाद्वायुरजायत ॥१३॥
The moon was born from his mind; from his eye the sun was born; from his mouth, Indra and Agni; from his breath, Vāyu was born.
And in the great wedding hymn — the one whose nakṣatra verse anchored the first essay's sky — the moon is Soma 'placed in the lap of the nakṣatras', and the hymn does something startlingly self-aware: it distinguishes the pressed plant from the heavenly Soma outright ('the Soma the brāhmaṇas know — of that no one eats'), and then states the phases as a bar-tab: when they drink you out, god, you swell up again. The refill doctrine, and the month made 'the shape of the years', in the Ṛgveda itself:
Ṛgveda 10.85.1–5 · c. 12th c. BCE or earlier
सत्येनोत्तभिता भूमिः सूर्येणोत्तभिता द्यौः ।
ऋतेनादित्यास्तिष्ठन्ति दिवि सोमो अधि श्रितः ॥१॥
सोमेनादित्या बलिनः सोमेन पृथिवी मही ।
अथो नक्षत्राणामेषामुपस्थे सोम आहितः ॥२॥
सोमं मन्यते पपिवान्यत्सम्पिंषन्त्योषधिम् ।
सोमं यं ब्रह्माणो विदुर्न तस्याश्नाति कश्चन ॥३॥
आच्छद्विधानैर्गुपितो बार्हतैः सोम रक्षितः ।
ग्राव्णामिच्छृण्वन्तिष्ठसि न ते अश्नाति पार्थिवः ॥४॥
यत्त्वा देव प्रपिबन्ति तत आ प्यायसे पुनः ।
वायुः सोमस्य रक्षिता समानां मास आकृतिः ॥५॥
By truth the earth is upheld; by the sun the sky is upheld; by cosmic order the Ādityas stand, and Soma is set upon heaven. By Soma the Ādityas are strong; by Soma the earth is great; and in the lap of these nakṣatras Soma is placed. One thinks he has drunk Soma when they crush the plant; the Soma the brāhmaṇas know — of that no one eats. Hidden by the covering rules, guarded by those of the Bṛhat, O Soma, you stand listening to the pressing-stones: no earthly one eats of you. And when they drink you out, O god, you swell up again; Vāyu is Soma's guardian; the month is the shape of the years.
The night he dwells at home
अमावास्या · the missing night
Where does the moon go on its one invisible night? The Śatapatha-brāhmaṇa answers with an etymology that is still the word for new moon in every Indian language: unseen 'neither in the east nor in the west', the moon has come down here — into the waters and the plants — and because that night he dwells at home (amā vasati), the night is named amāvāsyā. And he is gathered back out of the world the way everything edible is: through the cows —
Śatapatha-brāhmaṇa 1.6.4.5–6 · c. 8th–6th c. BCE
ते देवा अब्रुवन् । न वा इममन्यत्सोमाद्धिनुयात्सोममेवास्मै सम्भरामेति तस्मै सोमं समभरन्नेष वै सोमो राजा देवानामन्नं यच्चन्द्रमाः स यत्रैष एतां रात्रिं न पुरस्तान्न पश्चाद्ददृशे तदिमं लोकमागच्छति स इहैवापश्चौषधीश्च प्रविशति स वै देवानां वस्वन्नं ह्येषां तद्यदेष एतां रात्रिमिहामा वसति तस्मादमावास्या नाम
तं गोभिरनुविष्ठाप्य समभरन् । यदोषधीराश्नंस्तदोषधिभ्यो यदपोऽपिबंस्तदद्भ्यस्तमेवं संभृत्यातच्य तीव्रीकृत्य तमस्मै प्रायच्छन्
The gods said: 'Nothing other than Soma can invigorate him; let us gather Soma for him.' They gathered Soma for him. This king Soma, the food of the gods, is none other than the moon. When on this night he is seen neither in the east nor in the west, he comes to this world and enters here into the waters and the plants. He is the gods' treasure-food; and since on this night he dwells (vasati) at home (amā), therefore it is named amāvāsyā. Having set him going through the cows, they gathered him: what of the plants he had eaten, that from the plants; what of the waters he had drunk, that from the waters — having thus gathered him, distilled and sharpened him, they offered him to [Indra].
The same book runs the cycle from the other end — pressed at the full moon, draining into the world through the waning fortnight — and drops, in passing, the oldest hare in the Indian moon: śaśaś cāndramasaḥ, 'the hare belongs to the moon'. The mark every eye sees on the disc, the one that gives the moon its classical names śaśin and śaśāṅka, enters literature as an aside in a paragraph of liturgy:
Śatapatha-brāhmaṇa 11.1.5.3 · c. 8th–6th c. BCE
शशश्चान्द्रमस इति। चन्द्रमा वै सोमो देवानामन्नं तं पौर्णमास्यामभिषुण्वन्ति सोऽपरपक्षेऽप ओषधीः प्रविशति पशवो वा अप ओषधीरदन्ति तदेनमेतां रात्रीं पशुभ्यः संनयति
'And the hare belongs to the moon' — [so it is said]. The moon is Soma, the food of the gods: at the full moon they press him; then in the waning fortnight he enters the waters and the plants; the cattle eat him as the waters and plants; and so on this night one collects him back from the cattle.
Sixteen parts, one fixed
षोडशी कला · the arithmetic
The Bṛhadāraṇyaka gives the cycle its arithmetic. Prajāpati — the year, the moon — has sixteen kalās: fifteen of them are the nights, filled and emptied fortnight by fortnight; the sixteenth is dhruvā, fixed. On the new-moon night that fixed remainder survives by entering everything that breathes, and is born again at dawn — which is why, the text adds, on that night you must not take the breath of any creature. Not even a lizard's:
Bṛhadāraṇyaka-upaniṣad 1.5.14 · c. 800–600 BCE
स एष संवत्सरः प्रजापतिष्षोडशकलः ।
तस्य रात्रय एव पञ्चदश कला ।
ध्रुवैवास्य षोडशी कला ।
स रात्रिभिरेवा च पूर्यतेऽप च क्षीयते ।
सोऽमावास्यां रात्रिमेतया षोडश्या कलया सर्वमिदं प्राणभृदनुप्रविश्य ततः प्रातर्जायते ।
तस्मादेतां रात्रिं प्राणभृतः प्राणं न विच्छिन्द्यादपि कृकलासस्यैतस्या एव देवताया अपचित्यै ॥ १,५.१४ ॥
He — this year — is Prajāpati of sixteen parts (kalā). His nights alone are fifteen parts; his sixteenth part is the fixed one. By his nights he is filled and by them emptied. Having entered, on the new-moon night, with that sixteenth part into everything here that bears breath, he is born again in the morning. Therefore on that night let one not cut off the breath of anything that breathes — not even of a lizard — in honour of that very deity.
Fifteen countable parts and one invisible remainder that carries the cycle over the null night: it is the tithi-count of the working fortnight, wearing a theology. The Vedāṅga-jyotiṣa's parvan arithmetic and the omen-readers' audited fortnights (the thirteen-day pakṣa of the shadow essay) count the same fifteen.
Where the dead wait
पितृयाण · the address of the dead
The Chāndogya's doctrine of the two roads sends those who travelled by smoke and the dark fortnight up through the months to the fathers' world, to space — and then to the moon, which is still 'king Soma, the food of the gods'. The ancestors join the substance the gods drink; they stay while the residue of their works lasts; and they come back down as weather — wind, mist, cloud, rain:
Chāndogya-upaniṣad 5.10.4–5 · c. 800–600 BCE
मासेभ्यः पितृलोकं पितृलोकादाकाशमाकाशाच्चन्द्रमसमेष सोमो राजा तद्देवानामन्नं तं देवा भक्षयन्ति ॥ ४ ॥
तस्मिन्यवात्संपातमुषित्वाथैतमेवाध्वानं पुनर्निवर्तन्ते यथेतमाकाशमाकाशाद्वायुं वायुर्भूत्वा धूमो भवति धूमो भूत्वाभ्रं भवति ॥ ५ ॥
…from the months to the world of the fathers; from the world of the fathers to space; from space to the moon — that is king Soma; that is the food of the gods; the gods eat it. Having dwelt there as long as the residue [of their works] lasts, they return again by the very way they came: to space; from space to the wind; having become wind, one becomes smoke; having become smoke, one becomes mist…
The bright northern road that bypasses the moon altogether is the Gītā's uttarāyaṇa doctrine (attested in the database at BG 8.24-25) — the same two courses whose calendar the drift essay traced. In this ledger the moon is not only the cup and the calendar: it is an address.
Half a month down, half a month up
प्रभास · the settlement
The epic turns the whole account into a legal settlement. Soma, wasted by Dakṣa's curse (the twenty-seven nakṣatra-wives, one favoured — the same Rohiṇī the first essay's Cart belongs to), bathes at the Sarasvatī's meeting with the sea at Prabhāsa, and the terms are dictated on the spot — half a month waning, half a month waxing, forever — with the oath-formula repeated like a signature:
Mahābhārata 9.36.31–35 (vulgate) · c. 4th c. BCE – 4th c. CE
सरस्वत्या वरे तीर्थे निमज्जञ्शशलक्षणः।
पुनर्वर्धिष्यते देवास्तद्वै सत्यं वचो मम।।
मासार्धं च क्षयं सोमो नित्यमेव गमिष्यति।
मासार्धं तु पुनर्वृद्विं सत्यमेतद्वचो मम।।
समुद्रं पश्चिमं गत्वा सरस्वत्यब्धिसङ्गमम्।
आराधयतु देवेशं ततः कान्तिमवाप्स्यति।।
सरस्वतीं ततः सोमः स जगामर्षिशासनात्।
प्रभासं प्रथमं तीर्थं सरस्वत्या जगाम ह।।
अमावास्यां महातेजास्तत्रामज्जन्महाद्युतिः।
लोकान्प्रभासयामास शीतांशुत्वमवाप च।।
'Bathing at the best tīrtha of the Sarasvatī, the hare-marked one shall wax again, O gods — that word of mine is true. For half a month Soma shall always go to waning, and for half a month to waxing again — this word of mine is true. Let him go to the western ocean, to the confluence of the Sarasvatī with the sea, and propitiate the Lord of the gods; thereafter he will regain his beauty.' Then Soma went to the Sarasvatī at the ṛṣis' command; he went to Prabhāsa, the first tīrtha of the Sarasvatī. On the new-moon day that greatly radiant, greatly lustrous one bathed there, illumined the worlds, and obtained his cool-rayed state.
The astronomers take the ledger
आदित्यरश्मि · sunlight on water
Varāhamihira re-founds the phases on optics: the moon, watery, stands below the sun; the half toward him is lit, the other darkened by its own shadow — 'as with a pot standing in sunshine' — and moonlight is the sun's light taken up and given back, as a mirror fills a dark room with a sunbeam. The cup that refills has become geometry with similes:
Bṛhat-saṃhitā 4.1–4 · 6th c. CE
नित्यं अधःस्थस्यैन्दोर्भाभिर्भानोः सितं भवत्यर्धम् ।
स्वच्छाययाअन्यदसितं कुम्भस्यैवऽतपस्थस्य ।। ४.०१ ।।
सलिलमये शशिनि रवेर्दीधितयो मूर्छितास्तमो नैशम् ।
क्षपयन्ति दर्पणौदर*निहिता[क्.निहता] इव मन्दिरस्यान्तः ।। ४.०२ ।।
त्यजतो +अर्कतलं शशिनः पश्चादवलम्बते यथा शौक्ल्यम् ।
दिनकरवशात्तथाइन्दोः प्रकाशते +अधः प्रभृत्युदयः ।। ४.०३ ।।
प्रतिदिवसं एवं अर्कात्स्थानविशेषेण शौक्ल्यपरिवृद्धिः ।
भवति शशिनो +अपराह्णे पश्चाद्भागे घटस्यैव ४.०४ ।।
Of the moon, which stands ever below the sun, the half [facing him] becomes white by the sun's rays; the other, by its own shadow, dark — just as of a pot standing in sunshine. In the watery moon the sun's beams, taken up, dispel the night's darkness — as [rays] lodged in the belly of a mirror [dispel it] inside a house. As the moon leaves the sun's vicinity, its whiteness trails behind [on the western edge]; thus by the sun's doing the moon shines from its lower part upward at first appearance. So day by day, by its position relative to the sun, the moon's whiteness waxes — as [the sunlit side] of a pot in the afternoon.
The purāṇic ledger keeps a rival page: in the Bhāgavata's vertical cosmos the moon rides a hundred thousand yojanas above the sun — the order the siddhāntas inverted — and yet the same verse states the observational truth with perfect honesty: the moon is swiftest of gait, crossing in a day and a half what the sun needs a month for. Wrong shelf, right speeds:
Bhāgavata-purāṇa 5.22.8, 11 · c. 500–1000 CE
evaṃ candramā arkagabhastibhya upariṣṭāl lakṣayojanata upalabhyamāno 'rkasya saṃvatsarabhuktiṃ pakṣābhyāṃ māsabhuktiṃ sapādarkṣābhyāṃ dinenaiva pakṣabhuktim agracārī drutataragamano bhuṅkte // bhp_05.22.008 // tata upariṣṭād dvilakṣayojanato nakṣatrāṇi meruṃ dakṣiṇenaiva kālāyana īśvarayojitāni sahābhijitāṣṭāviṃśatiḥ // bhp_05.22.011 //
Thus the moon, found a hundred thousand yojanas above the rays of the sun, moving in front, swiftest of gait, traverses in two fortnights the sun's year-course, in two-and-a-quarter days its month-course, in a single day its fortnight-course. … Above that, two hundred thousand yojanas higher, are the nakṣatras — twenty-eight together with Abhijit — yoked by the Lord to the wheel of time, keeping Meru to their south(?).
See: the reflection's siblings in essay three
The earth in the hare-mark
शशलक्षण · the first map
And one astonishing passage closes the circle on the hare. When Dhṛtarāṣṭra asks Sañjaya for the measure of the earth, the epic's cosmography answers with an instruction: describe as much of the earth as is seen in the hare-mark — the moon's dark figure read as a reflection of our own continents. The mark the Śatapatha called a hare has become a mirror, and the mirror a map:
Mahābhārata 6.6.1–2 (vulgate) · c. 4th c. BCE – 4th c. CE
उक्तो द्वीपस्य संक्षेपो विधिवद्बुद्धिमंस्त्वया। तत्त्वज्ञश्चासि सर्वस्य विस्तारं ब्रूहि सञ्जय ।। यावान्भूम्यवकाशोऽयं दृश्यते शशलक्षणे। तस्य प्रमाणं प्रब्रूहि ततो वक्ष्यसि पिप्पलम् ।।
You have duly stated the summary of the continent, wise one; being a knower of the truth of it all, now tell its extent, Sañjaya. Declare the measure of as much of this expanse of earth as is seen in the hare-mark; then you shall speak of the pippala.
See: the five stars the texts kept watching
आ प्यायसे पुनः — you swell up again
Run the ledger once more, in order: a god poured out and refilled (Ṛgveda); a missing night explained by a homecoming and named for it — amāvāsyā (Śatapatha); a hare noticed on the disc in a sentence of liturgy; sixteen parts with one fixed remainder that never empties (Bṛhadāraṇyaka); the dead lodged in the cup while their balance runs down (Chāndogya); the terms fixed in perpetuity at Prabhāsa (Mahābhārata); the phases refounded as reflection (Varāhamihira); the speeds kept honest even where the shelf-order was wrong (Bhāgavata); and the mark on the disc read, at last, as a mirror of the earth. Every stage keeps what the eye actually sees — the waxing, the null night, the mark — and every stage balances: the cup always refills.
Each quote carries its full citation, edition, revision-pinned source link and confidence grading in Jñānakośa — batch soma-moon-pass1 (which opened the Bṛhadāraṇyaka as a source) with the standing astronomy passes. The moon itself is overhead somewhere right now, at some tithi of its fifteen — the companion app will tell you which, and where to look.