महाभारतः mahābhārataḥ - book-1, chapter-34, verse-13

तस्य पुत्रो जरत्कारोरुत्पत्स्यति महातपाः ।
आस्तीको नाम यज्ञं स प्रतिषेत्स्यति तं तदा ।
तत्र मोक्ष्यन्ति भुजगा ये भविष्यन्ति धार्मिकाः ॥१३॥

13. tasya putro jaratkārorutpatsyati mahātapāḥ ,
āstīko nāma yajñaṁ sa pratiṣetsyati taṁ tadā ,
tatra mokṣyanti bhujagā ye bhaviṣyanti dhārmikāḥ.

13. tasya putraḥ jaratkāroḥ utpatasyati
mahātapāḥ āstīkaḥ nāma yajñam sa
pratiṣetsyati tam tadā tatra mokṣyanti
bhujagāḥ ye bhaviṣyanti dhārmikāḥ

13. A son of Jaratkāru, a great ascetic named Āstīka, will be born. He will then stop that sacrifice. At that time, the righteous serpents who are there will be liberated.

Words meanings summery:

• तस्य (tasya) - his (referring to Jaratkāru) (his, of him)

• पुत्रः (putraḥ) - son

• जरत्कारोः (jaratkāroḥ) - of Jaratkāru

• उत्पतस्यति (utpatasyati) - will be born (will be born, will arise)

• महातपाः (mahātapāḥ) - a great ascetic (of great austerity, a great ascetic)

• आस्तीकः (āstīkaḥ) - Āstīka (the name of the son) (Āstīka (proper noun))

• नाम (nāma) - named (by name, indeed, namely)

• यज्ञम् (yajñam) - the sacrifice (of Janamejaya) (sacrifice, ritual)

• स (sa) - he (Āstīka) (he, that)

• प्रतिषेत्स्यति (pratiṣetsyati) - will prevent (will obstruct, will prevent, will forbid)

• तम् (tam) - that (sacrifice) (that, him)

• तदा (tadā) - then (then, at that time)

• तत्र (tatra) - at that time / there (at the sacrifice) (there, then)

• मोक्ष्यन्ति (mokṣyanti) - will be liberated (will be liberated, will be released)

• भुजगाः (bhujagāḥ) - serpents (serpents, snakes)

• ये (ye) - those (serpents) who (those who, which)

• भविष्यन्ति (bhaviṣyanti) - will be (will be, will exist)

• धार्मिकाः (dhārmikāḥ) - righteous (righteous, virtuous, pious)

Words meanings and morphology

तस्य (tasya) - his (referring to Jaratkāru) (his, of him)

(pronoun)

Genitive, masculine, singular of tad

tad - that, those, he, it

Note: Qualifies putraḥ.

पुत्रः (putraḥ) - son

(noun)

Nominative, masculine, singular of putra

putra - son, child

Note: Subject of utpatasyati.

जरत्कारोः (jaratkāroḥ) - of Jaratkāru

(noun)

Genitive, masculine, singular of jaratkāru

jaratkāru - Jaratkāru (a sage)

Compound type : bahuvrīhi (jarat+kāru)

• jarat – decaying, old, worn out
  adjective
  present participle
  From √jṝ (to grow old)
  Root: jṝ (class 9)
• kāru – maker, doer, artisan; 'body'
  noun (masculine)
  From √kṛ (to do, to make)
  Root: kṛ (class 8)

Note: Denotes possession, "Jaratkāru's son".

उत्पतस्यति (utpatasyati) - will be born (will be born, will arise)

(verb)

3rd person , singular, active, future (lṛṭ) of pat

Prefix: ut

Root: pat (class 1)

Note: From ut-√pat.

महातपाः (mahātapāḥ) - a great ascetic (of great austerity, a great ascetic)

(adjective)

Nominative, masculine, singular of mahātapas

mahātapas - of great austerity, a great ascetic; great penance

Compound type : bahuvrīhi (mahā+tapas)

• mahā – great, large
  adjective
• tapas – austerity, penance, heat
  noun (neuter)
  From √tap (to heat, to perform austerity)
  Root: tap (class 1)

Note: Agrees with putraḥ.

आस्तीकः (āstīkaḥ) - Āstīka (the name of the son) (Āstīka (proper noun))

(noun)

Nominative, masculine, singular of āstīka

āstīka - Āstīka (a sage, son of Jaratkāru and Manasā, famous for stopping the serpent sacrifice of Janamejaya)

Note: Proper noun.

नाम (nāma) - named (by name, indeed, namely)

(indeclinable)

Accusative singular used adverbially.

Note: Used as an adverb here.

यज्ञम् (yajñam) - the sacrifice (of Janamejaya) (sacrifice, ritual)

(noun)

Accusative, masculine, singular of yajña

yajña - sacrifice, offering, ritual

action noun

From √yaj (to sacrifice)

Root: yaj (class 1)

Note: Object of pratiṣetsyati.

स (sa) - he (Āstīka) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, those, he, it

Note: saḥ before pratiṣetsyati.

प्रतिषेत्स्यति (pratiṣetsyati) - will prevent (will obstruct, will prevent, will forbid)

(verb)

3rd person , singular, active, future (lṛṭ) of sidh

Prefix: prati

Root: sidh (class 1)

Note: From prati-√sidh.

तम् (tam) - that (sacrifice) (that, him)

(pronoun)

Accusative, masculine, singular of tad

tad - that, those, he, it

Note: Refers to yajñam.

तदा (tadā) - then (then, at that time)

(indeclinable)

तत्र (tatra) - at that time / there (at the sacrifice) (there, then)

(indeclinable)

Note: Refers to the time and place of the sacrifice.

मोक्ष्यन्ति (mokṣyanti) - will be liberated (will be liberated, will be released)

(verb)

3rd person , plural, active, future (lṛṭ) of muc

Root: muc (class 6)

Note: The root muc is often used in passive sense for liberation. Here mokṣyanti is standard active form, but meaning is passive "will be liberated".

भुजगाः (bhujagāḥ) - serpents (serpents, snakes)

(noun)

Nominative, masculine, plural of bhujaga

bhujaga - serpent, snake (lit. 'moving with the arm/body')

From bhuja ('arm, bend') + ga ('going')

Compound type : tatpuruṣa (bhuja+ga)

• bhuja – arm, hand; shoulder; curvature, bend
  noun (masculine)
• ga – going, moving
  adjective
  From root √gam (to go)
  Root: gam (class 1)

Note: Subject of mokṣyanti.

ये (ye) - those (serpents) who (those who, which)

(pronoun)

Nominative, masculine, plural of yad

yad - which, who, what

Note: Refers to bhujagāḥ.

भविष्यन्ति (bhaviṣyanti) - will be (will be, will exist)

(verb)

3rd person , plural, active, future (lṛṭ) of bhū

Root: bhū (class 1)

धार्मिकाः (dhārmikāḥ) - righteous (righteous, virtuous, pious)

(adjective)

Nominative, masculine, plural of dhārmika

dhārmika - righteous, virtuous, pious, just, conforming to dharma

From dharma + -ika (taddhita suffix)

Note: Agrees with ye (and bhujagāḥ).