महाभारतः mahābhārataḥ - book-3, chapter-81, verse-139

ततो गच्छेत राजेन्द्र रेणुकातीर्थमुत्तमम् ।
तत्राभिषेकं कुर्वीत पितृदेवार्चने रतः ।
सर्वपापविशुद्धात्मा अग्निष्टोमफलं लभेत् ॥१३९॥

139. tato gaccheta rājendra reṇukātīrthamuttamam ,
tatrābhiṣekaṁ kurvīta pitṛdevārcane rataḥ ,
sarvapāpaviśuddhātmā agniṣṭomaphalaṁ labhet.

139. tataḥ gaccheta rājendra reṇukātīrtham
uttamam tatra abhiṣekam kurvīta
pitṛdevārcane rataḥ
sarvapāpaviśuddhātmā agniṣṭomaphalam labhet

139. O King, one should then go to the excellent sacred bathing place (tīrtha) of Reṇukā. There, being devoted to the worship of ancestors (pitṛ) and gods (deva), one should perform an ablution (abhiṣeka). With his inner self (ātman) completely purified from all sins, he will obtain the merit of the Agniṣṭoma (yajña) sacrifice.

Words meanings summery:

• ततः (tataḥ) - then, thereafter

• गच्छेत (gaccheta) - should go, may go

• राजेन्द्र (rājendra) - O King (addressed to Yudhiṣṭhira) (O chief of kings, O best of kings)

• रेणुकातीर्थम् (reṇukātīrtham) - the sacred bathing place of Reṇukā

• उत्तमम् (uttamam) - excellent, best, highest

• तत्र (tatra) - there

• अभिषेकम् (abhiṣekam) - ablution, bathing, consecration

• कुर्वीत (kurvīta) - should do, should perform

• पितृदेवार्चने (pitṛdevārcane) - in the worship of ancestors and gods

• रतः (rataḥ) - devoted, intent on, delighted in

• सर्वपापविशुद्धात्मा (sarvapāpaviśuddhātmā) - with his inner self (ātman) completely purified from all sins (whose self is purified from all sins)

• अग्निष्टोमफलम् (agniṣṭomaphalam) - the merit of the Agniṣṭoma (yajña) sacrifice (the fruit/result of the Agniṣṭoma sacrifice)

• लभेत् (labhet) - should obtain, may obtain

Words meanings and morphology

ततः (tataḥ) - then, thereafter

(indeclinable)

गच्छेत (gaccheta) - should go, may go

(verb)

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

Optative Mood, 3rd Person, Singular

Root: gam (class 1)

राजेन्द्र (rājendra) - O King (addressed to Yudhiṣṭhira) (O chief of kings, O best of kings)

(compound noun)

Compound type : ṣaṣṭhī tatpuruṣa (rājan+indra)

• rājan – king
  noun (masculine)
• indra – Indra (chief of gods), chief, best
  noun (masculine)

रेणुकातीर्थम् (reṇukātīrtham) - the sacred bathing place of Reṇukā

(compound noun)

Compound type : ṣaṣṭhī tatpuruṣa (reṇukā+tīrtha)

• reṇukā – name of a female sage, wife of Jamadagni and mother of Paraśurāma
  proper noun (feminine)
• tīrtha – sacred place, bathing place
  noun (neuter)

उत्तमम् (uttamam) - excellent, best, highest

(adjective)

Accusative, neuter, singular of uttama

uttama - highest, best, excellent, superior

Note: Qualifies reṇukātīrtham.

तत्र (tatra) - there

(indeclinable)

अभिषेकम् (abhiṣekam) - ablution, bathing, consecration

(noun)

Accusative, masculine, singular of abhiṣeka

abhiṣeka - bathing, ablution, anointing, consecration

action noun

Derived from root sic with prefix abhi

Prefix: abhi

Root: sic (class 6)

कुर्वीत (kurvīta) - should do, should perform

(verb)

3rd person , singular, middle, optative (vidhi liṅ) of kṛ

Optative Mood, 3rd Person, Singular

Root: kṛ (class 8)

पितृदेवार्चने (pitṛdevārcane) - in the worship of ancestors and gods

(compound noun)

Compound type : dvandva / tatpuruṣa (pitṛ+deva+arcana)

• pitṛ – father, ancestor, forefathers
  noun (masculine)
• deva – god, deity
  noun (masculine)
• arcana – worship, adoration
  noun (neuter)
  action noun
  Derived from root arc
  Root: arc (class 1)

Note: Locative absolute or indicating the sphere of activity.

रतः (rataḥ) - devoted, intent on, delighted in

(adjective)

Nominative, masculine, singular of rata

rata - devoted to, engaged in, attached to, delighted in

Past Passive Participle

Derived from root ram

Root: ram (class 1)

Note: Refers to the implied subject of kurvīta.

सर्वपापविशुद्धात्मा (sarvapāpaviśuddhātmā) - with his inner self (ātman) completely purified from all sins (whose self is purified from all sins)

(compound adjective)

Compound type : bahuvrīhi (sarva+pāpa+viśuddha+ātman)

• sarva – all, every, whole
  adjective
• pāpa – sin, evil
  noun (neuter)
• viśuddha – purified, clean, spotless
  adjective (masculine)
  Past Passive Participle
  Derived from root śudh with prefix vi
  Prefix: vi
  Root: śudh (class 4)
• ātman – self, soul, spirit, individual self
  noun (masculine)

अग्निष्टोमफलम् (agniṣṭomaphalam) - the merit of the Agniṣṭoma (yajña) sacrifice (the fruit/result of the Agniṣṭoma sacrifice)

(compound noun)

Compound type : ṣaṣṭhī tatpuruṣa (agniṣṭoma+phala)

• agniṣṭoma – a type of Soma sacrifice, a major Vedic ritual
  noun (masculine)
• phala – fruit, result, merit
  noun (neuter)

लभेत् (labhet) - should obtain, may obtain

(verb)

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

Optative Mood, 3rd Person, Singular

Root: labh (class 1)

Note: Parasmaipada form.