महाभारतः mahābhārataḥ - book-3, chapter-80, verse-80

त्रिरात्रमुषितस्तत्र तर्पयेत्पितृदेवताः ।
प्रभासते यथा सोमो अश्वमेधं च विन्दति ॥८०॥

80. trirātramuṣitastatra tarpayetpitṛdevatāḥ ,
prabhāsate yathā somo aśvamedhaṁ ca vindati.

80. trirātram uṣitaḥ tatra tarpayet pitṛdevatāḥ
prabhāsate yathā somaḥ aśvamedham ca vindati

80. Having resided there for three nights, one should satisfy the ancestors and deities. He shines like the moon and obtains the fruit of an horse sacrifice (aśvamedha).

Words meanings summery:

• त्रिरात्रम् (trirātram) - for three nights, three nights

• उषितः (uṣitaḥ) - having resided, having stayed

• तत्र (tatra) - there, in that place

• तर्पयेत् (tarpayet) - one should satisfy, he should offer oblations

• पितृदेवताः (pitṛdevatāḥ) - ancestors and deities, manes and gods

• प्रभासते (prabhāsate) - he shines forth, he becomes luminous

• यथा (yathā) - as, just as, like

• सोमः (somaḥ) - the moon (the moon, Soma plant/juice)

• अश्वमेधम् (aśvamedham) - a horse sacrifice (aśvamedha) (horse sacrifice)

• च (ca) - and, also

• विन्दति (vindati) - he obtains, he finds, he gains

Words meanings and morphology

त्रिरात्रम् (trirātram) - for three nights, three nights

(noun)

Accusative, neuter, singular of trirātra

trirātra - period of three nights

Compound type : dvigu (tri+rātra)

• tri – three
  numeral
• rātra – night
  noun (neuter)

Note: Adverbial accusative of duration.

उषितः (uṣitaḥ) - having resided, having stayed

(adjective)

Nominative, masculine, singular of uṣita

uṣita - resided, dwelt, stayed

Past Passive Participle

Derived from root vas (to dwell) with initial u-.

Root: vas (class 1)

तत्र (tatra) - there, in that place

(indeclinable)

Locative form of 'tad' used as an indeclinable adverb.

तर्पयेत् (tarpayet) - one should satisfy, he should offer oblations

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of tṛp

Optative Causative Active

3rd person singular, optative mood, causative stem (tarpay-), active voice.

Root: tṛp (class 4)

पितृदेवताः (pitṛdevatāḥ) - ancestors and deities, manes and gods

(noun)

Accusative, feminine, plural of pitṛdevatā

pitṛdevatā - ancestors and deities, manes and gods

Compound type : dvandva (pitṛ+devatā)

• pitṛ – father, ancestor, forefather
  noun (masculine)
• devatā – deity, godhead, divinity
  noun (feminine)

Note: Object of 'tarpayet'.

प्रभासते (prabhāsate) - he shines forth, he becomes luminous

(verb)

3rd person , singular, middle, present (laṭ) of prabhās

Present Middle

3rd person singular, present indicative, middle voice. Root bhās (to shine) with upasarga pra-.

Prefix: pra

Root: bhās (class 1)

यथा (yathā) - as, just as, like

(indeclinable)

सोमः (somaḥ) - the moon (the moon, Soma plant/juice)

(noun)

Nominative, masculine, singular of soma

soma - Soma (plant, deity), moon

Root: su (class 5)

अश्वमेधम् (aśvamedham) - a horse sacrifice (aśvamedha) (horse sacrifice)

(noun)

Accusative, masculine, singular of aśvamedha

aśvamedha - horse sacrifice (a major Vedic ritual)

Compound type : tatpuruṣa (aśva+medha)

• aśva – horse
  noun (masculine)
• medha – sacrifice, oblation
  noun (masculine)
  Root: medh (class 1)

Note: Object of 'vindati'.

च (ca) - and, also

(indeclinable)

Conjunction.

विन्दति (vindati) - he obtains, he finds, he gains

(verb)

3rd person , singular, active, present (laṭ) of vid

Present Active

3rd person singular, present indicative, active voice. Root vid (class 7, though some forms are class 6).

Root: vid (class 7)