महाभारतः mahābhārataḥ - book-3, chapter-82, verse-137

स्नात्वा कोकामुखे पुण्ये ब्रह्मचारी यतव्रतः ।
जातिस्मरत्वं प्राप्नोति दृष्टमेतत्पुरातने ॥१३७॥

137. snātvā kokāmukhe puṇye brahmacārī yatavrataḥ ,
jātismaratvaṁ prāpnoti dṛṣṭametatpurātane.

137. snātvā kokāmukhe puṇye brahmacārī yatavrataḥ
jātismaratvam prāpnoti dṛṣṭam etat purātane

137. A student of sacred knowledge (brahmacārī) who is self-restrained, by bathing in the sacred Kokāmukha, attains the ability to remember past lives. This has been observed in ancient accounts.

Words meanings summery:

• स्नात्वा (snātvā) - having bathed

• कोकामुखे (kokāmukhe) - in the sacred place named Kokāmukha (in Kokāmukha)

• पुण्ये (puṇye) - sacred, meritorious, pure

• ब्रह्मचारी (brahmacārī) - a student of sacred knowledge (brahmacārī), celibate student

• यतव्रतः (yatavrataḥ) - observing vows, self-restrained, disciplined

• जातिस्मरत्वम् (jātismaratvam) - the state of remembering past lives

• प्राप्नोति (prāpnoti) - obtains, attains, reaches

• दृष्टम् (dṛṣṭam) - it has been seen/observed (this fact) (seen, observed)

• एतत् (etat) - this (ability/phenomenon) (this)

• पुरातने (purātane) - in ancient traditions or accounts (in ancient (times/stories))

Words meanings and morphology

स्नात्वा (snātvā) - having bathed

(indeclinable)

absolutive (gerund)

Absolutive form from the root snā (to bathe)

Root: snā (class 2)

कोकामुखे (kokāmukhe) - in the sacred place named Kokāmukha (in Kokāmukha)

(proper noun)

Locative, neuter, singular of kokāmukha

kokāmukha - Kokāmukha (name of a sacred place or tīrtha)

Compound type : tatpurusha (kokā+mukha)

• kokā – Koka (name of a river)
  proper noun (feminine)
• mukha – mouth, face, entrance, head
  noun (neuter)

पुण्ये (puṇye) - sacred, meritorious, pure

(adjective)

Locative, neuter, singular of puṇya

puṇya - sacred, meritorious, virtuous, pure

Note: Agrees with kokāmukhe

ब्रह्मचारी (brahmacārī) - a student of sacred knowledge (brahmacārī), celibate student

(noun)

Nominative, masculine, singular of brahmacārin

brahmacārin - a student of sacred knowledge, one who practices celibacy or sacred vows, an ascetic

Compound type : tatpurusha (brahman+cārin)

• brahman – the Vedas, sacred knowledge, supreme reality
  noun (neuter)
• cārin – going, walking, practicing, observing
  adjective (masculine)
  Agent noun from root car (to move, practice)
  Root: car (class 1)

यतव्रतः (yatavrataḥ) - observing vows, self-restrained, disciplined

(adjective)

Nominative, masculine, singular of yatavrata

yatavrata - observing vows, self-restrained, disciplined

Compound type : bahuvrihi (yata+vrata)

• yata – controlled, restrained, self-controlled
  adjective (masculine)
  Past Passive Participle
  Past Passive Participle of the root yam (to restrain, control)
  Root: yam (class 1)
• vrata – vow, sacred observance, religious practice
  noun (neuter)

Note: Agrees with brahmacārī

जातिस्मरत्वम् (jātismaratvam) - the state of remembering past lives

(noun)

Accusative, neuter, singular of jātismaratva

jātismaratva - the state or condition of remembering past lives

Derived from jātismara (remembering past lives) with suffix -tva (indicating state or quality)

Compound type : tatpurusha (jātismara+tva)

• jātismara – remembering past lives
  adjective (masculine)
  Root: smṛ (class 1)
• tva – suffix denoting abstract noun; state, quality, condition
  suffix (neuter)

प्राप्नोति (prāpnoti) - obtains, attains, reaches

(verb)

3rd person , singular, active, present (lat) of prāp

Root āp with prefix pra

Prefix: pra

Root: āp (class 5)

दृष्टम् (dṛṣṭam) - it has been seen/observed (this fact) (seen, observed)

(adjective)

Nominative, neuter, singular of dṛṣṭa

dṛṣṭa - seen, observed, perceived, known

Past Passive Participle

Past Passive Participle of the root dṛś (to see)

Root: dṛś (class 1)

एतत् (etat) - this (ability/phenomenon) (this)

(pronoun)

Nominative, neuter, singular of etad

etad - this

पुरातने (purātane) - in ancient traditions or accounts (in ancient (times/stories))

(adjective)

Locative, neuter, singular of purātana

purātana - ancient, old, traditional

Derived from purā (formerly, in olden times) with suffix -tana

Note: Adverbial usage, or modifying an implied noun like 'itihāse' (in history/accounts)