महाभारतः mahābhārataḥ - book-5, chapter-13, verse-12

तेषां तद्वचनं श्रुत्वा देवानां विष्णुरब्रवीत् ।
मामेव यजतां शक्रः पावयिष्यामि वज्रिणम् ॥१२॥

12. teṣāṁ tadvacanaṁ śrutvā devānāṁ viṣṇurabravīt ,
māmeva yajatāṁ śakraḥ pāvayiṣyāmi vajriṇam.

12. teṣām tat-vacanam śrutvā devānām viṣṇuḥ abravīt
mām eva yajatām śakraḥ pāvayisyāmi vajriṇam

12. Having heard their words, Vishnu said to the gods: 'Let Indra (Śakra) worship Me alone; I will purify the wielder of the thunderbolt (Vajrin).'

Words meanings summery:

• तेषाम् (teṣām) - of the gods (who spoke in the previous verse) (of them, their)

• तत्-वचनम् (tat-vacanam) - that word, their statement

• श्रुत्वा (śrutvā) - having heard

• देवानाम् (devānām) - of the gods

• विष्णुः (viṣṇuḥ) - Vishnu

• अब्रवीत् (abravīt) - he said, spoke

• माम् (mām) - me

• एव (eva) - only, just, indeed

• यजताम् (yajatām) - let him worship, let him sacrifice

• शक्रः (śakraḥ) - Indra (Śakra)

• पावयिस्यामि (pāvayisyāmi) - I will purify

• वज्रिणम् (vajriṇam) - Indra (the wielder of the thunderbolt (Vajrin))

Words meanings and morphology

तेषाम् (teṣām) - of the gods (who spoke in the previous verse) (of them, their)

(pronoun)

Genitive, masculine, plural of tad

tad - that, those

तत्-वचनम् (tat-vacanam) - that word, their statement

(noun)

Accusative, neuter, singular of tat-vacana

tat-vacana - that word, that statement

Compound type : tatpurusha (tad+vacana)

• tad – that, it
  pronoun
• vacana – word, speech, statement
  noun (neuter)

श्रुत्वा (śrutvā) - having heard

(indeclinable)

Absolutive (gerund)

Root: śru (class 5)

देवानाम् (devānām) - of the gods

(noun)

Genitive, masculine, plural of deva

deva - god, deity

विष्णुः (viṣṇuḥ) - Vishnu

(proper noun)

Nominative, masculine, singular of viṣṇu

viṣṇu - Vishnu (a proper noun for the deity)

अब्रवीत् (abravīt) - he said, spoke

(verb)

3rd person , singular, active, past imperfect (laṅ) of brū

Root: brū (class 2)

माम् (mām) - me

(pronoun)

Accusative, singular of aham

aham - I

एव (eva) - only, just, indeed

(indeclinable)

यजताम् (yajatām) - let him worship, let him sacrifice

(verb)

3rd person , singular, active, imperative (loṭ) of yaj

Root: yaj (class 1)

शक्रः (śakraḥ) - Indra (Śakra)

(proper noun)

Nominative, masculine, singular of śakra

śakra - Indra, powerful, mighty

पावयिस्यामि (pāvayisyāmi) - I will purify

(verb)

1st person , singular, active, future (lṛṭ) of pū

Causative future

Root: pū (class 1)

वज्रिणम् (vajriṇam) - Indra (the wielder of the thunderbolt (Vajrin))

(proper noun)

Accusative, masculine, singular of vajrin

vajrin - wielder of the thunderbolt (epithet of Indra)