महाभारतः mahābhārataḥ - book-12, chapter-224, verse-15

पित्र्ये रात्र्यहनी मासः प्रविभागस्तयोः पुनः ।
कृष्णोऽहः कर्मचेष्टायां शुक्लः स्वप्नाय शर्वरी ॥१५॥

15. pitrye rātryahanī māsaḥ pravibhāgastayoḥ punaḥ ,
kṛṣṇo'haḥ karmaceṣṭāyāṁ śuklaḥ svapnāya śarvarī.

15. pitrye rātryahanī māsaḥ pravibhāgaḥ tayoḥ punaḥ
kṛṣṇaḥ ahaḥ karmaceṣṭāyām śuklaḥ svapnāya śarvarī

15. māsaḥ pitrye rātryahanī punaḥ tayoḥ pravibhāgaḥ
kṛṣṇaḥ ahaḥ karmaceṣṭāyām śuklaḥ śarvarī svapnāya

15. In the ancestral (pitṛ) realm, a month constitutes their day and night. Furthermore, regarding the division of these two, the dark fortnight (kṛṣṇa pakṣa) is their day for activities, and the bright fortnight (śukla pakṣa) is their night for sleep.

Words meanings summery:

• पित्र्ये (pitrye) - in the ancestral sphere, relating to ancestors

• रात्र्यहनी (rātryahanī) - night and day

• मासः (māsaḥ) - a month

• प्रविभागः (pravibhāgaḥ) - division, apportionment

• तयोः (tayoḥ) - of these two, of them

• पुनः (punaḥ) - again, moreover, further

• कृष्णः (kṛṣṇaḥ) - referring to the dark fortnight (kṛṣṇa pakṣa) (dark, dark fortnight)

• अहः (ahaḥ) - day

• कर्मचेष्टायाम् (karmaceṣṭāyām) - for activities, in the sphere of action

• शुक्लः (śuklaḥ) - referring to the bright fortnight (śukla pakṣa) (bright, bright fortnight)

• स्वप्नाय (svapnāya) - for sleep

• शर्वरी (śarvarī) - night

Words meanings and morphology

पित्र्ये (pitrye) - in the ancestral sphere, relating to ancestors

(adjective)

Locative, neuter, singular of pitrya

pitrya - ancestral, pertaining to Pitṛs

Note: Adjective in locative singular, modifying an implied noun like 'loke' (in the realm).

रात्र्यहनी (rātryahanī) - night and day

(noun)

Nominative, neuter, dual of rātryahan

rātryahan - night and day

Compound type : dvandva (rātri+ahan)

• rātri – night
  noun (feminine)
• ahan – day
  noun (neuter)

मासः (māsaḥ) - a month

(noun)

Nominative, masculine, singular of māsa

māsa - month

प्रविभागः (pravibhāgaḥ) - division, apportionment

(noun)

Nominative, masculine, singular of pravibhāga

pravibhāga - division, partition, distribution

Prefixes: pra+vi

Root: bhaj (class 7)

तयोः (tayoḥ) - of these two, of them

(pronoun)

Genitive, masculine, dual of tad

tad - that, those

Note: Refers to the 'day and night' of the ancestral realm.

पुनः (punaḥ) - again, moreover, further

(indeclinable)

कृष्णः (kṛṣṇaḥ) - referring to the dark fortnight (kṛṣṇa pakṣa) (dark, dark fortnight)

(adjective)

Nominative, masculine, singular of kṛṣṇa

kṛṣṇa - dark, black; Krishna (proper noun); dark fortnight

Note: Modifies an implied 'pakṣaḥ' (fortnight).

अहः (ahaḥ) - day

(noun)

Nominative, neuter, singular of ahan

ahan - day

कर्मचेष्टायाम् (karmaceṣṭāyām) - for activities, in the sphere of action

(noun)

Locative, feminine, singular of karmaceṣṭā

karmaceṣṭā - activity of action, busy work, effort in action

Compound type : tatpuruṣa (karman+ceṣṭā)

• karman – action, deed, work (karma)
  noun (neuter)
  Root: kṛ (class 8)
• ceṣṭā – activity, effort, action
  noun (feminine)
  Root: ceṣṭ (class 1)

शुक्लः (śuklaḥ) - referring to the bright fortnight (śukla pakṣa) (bright, bright fortnight)

(adjective)

Nominative, masculine, singular of śukla

śukla - bright, white, clear, pure; bright fortnight

Note: Modifies an implied 'pakṣaḥ' (fortnight).

स्वप्नाय (svapnāya) - for sleep

(noun)

Dative, masculine, singular of svapna

svapna - sleep, dream

शर्वरी (śarvarī) - night

(noun)

Nominative, feminine, singular of śarvarī

śarvarī - night