महाभारतः mahābhārataḥ - book-13, chapter-26, verse-55

तथा ब्रह्मसरो गत्वा धर्मारण्योपशोभितम् ।
पुण्डरीकमवाप्नोति प्रभातां शर्वरीं शुचिः ॥५५॥

55. tathā brahmasaro gatvā dharmāraṇyopaśobhitam ,
puṇḍarīkamavāpnoti prabhātāṁ śarvarīṁ śuciḥ.

55. tathā brahmasaraḥ gatvā dharmāraṇyopaśobhitam
puṇḍarīkam avāpnoti prabhātām śarvarīm śuciḥ

55. śuciḥ tathā dharmāraṇyopaśobhitam brahmasaraḥ
gatvā prabhātām śarvarīm puṇḍarīkam avāpnoti

55. Having gone to the Brahma lake, which is adorned by the forest of natural law (dharma), a pure person obtains the supreme reward (puṇḍarīka) at the break of dawn.

Words meanings summery:

• तथा (tathā) - thus, then, and

• ब्रह्मसरः (brahmasaraḥ) - Brahma's lake, the lake of Brahmā

• गत्वा (gatvā) - having gone

• धर्मारण्योपशोभितम् (dharmāraṇyopaśobhitam) - adorned by the forest of natural law

• पुण्डरीकम् (puṇḍarīkam) - the supreme spiritual reward or heaven (white lotus, supreme reward, heaven, merit)

• अवाप्नोति (avāpnoti) - obtains, reaches, attains

• प्रभाताम् (prabhātām) - at the break of dawn (dawned, brightened, made clear)

• शर्वरीम् (śarvarīm) - night

• शुचिः (śuciḥ) - pure, clean, holy

Words meanings and morphology

तथा (tathā) - thus, then, and

(indeclinable)

ब्रह्मसरः (brahmasaraḥ) - Brahma's lake, the lake of Brahmā

(noun)

Accusative, neuter, singular of brahmasaras

brahmasaras - a lake of Brahmā

Compound type : tatpuruṣa (brahman+saras)

• brahman – Brahmā (the creator deity), the Absolute
  proper noun (masculine)
• saras – lake, pond, pool
  noun (neuter)

Note: Original sandhi with gatvā makes it brahmasaro

गत्वा (gatvā) - having gone

(indeclinable)

absolutive (indeclinable participle)

formed from root gam with suffix -tvā

Root: gam (class 1)

धर्मारण्योपशोभितम् (dharmāraṇyopaśobhitam) - adorned by the forest of natural law

(adjective)

Accusative, neuter, singular of dharmāraṇyopaśobhita

dharmāraṇyopaśobhita - adorned by the forest of dharma

Compound type : tatpuruṣa (dharma+araṇya+upaśobhita)

• dharma – natural law, constitution, intrinsic nature, duty, righteousness
  noun (masculine)
  Root: dhṛ (class 1)
• araṇya – forest, wilderness
  noun (neuter)
• upaśobhita – adorned, decorated
  adjective (masculine)
  Past Passive Participle
  formed from root śubh with upasarga upa
  Prefix: upa
  Root: śubh (class 1)

पुण्डरीकम् (puṇḍarīkam) - the supreme spiritual reward or heaven (white lotus, supreme reward, heaven, merit)

(noun)

Accusative, neuter, singular of puṇḍarīka

puṇḍarīka - a white lotus, emblem of purity; a specific result or reward (often heaven or great merit)

अवाप्नोति (avāpnoti) - obtains, reaches, attains

(verb)

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

Prefix: ava

Root: āp (class 5)

प्रभाताम् (prabhātām) - at the break of dawn (dawned, brightened, made clear)

(adjective)

Accusative, feminine, singular of prabhāta

prabhāta - dawned, brightened, become clear; dawn (as a noun)

Past Passive Participle

formed from root bhā with upasarga pra

Prefix: pra

Root: bhā (class 2)

Note: Qualifies śarvarīm

शर्वरीम् (śarvarīm) - night

(noun)

Accusative, feminine, singular of śarvarī

śarvarī - night

Note: Here used in an adverbial sense, meaning 'when the night has dawned' or 'at dawn'.

शुचिः (śuciḥ) - pure, clean, holy

(adjective)

Nominative, masculine, singular of śuci

śuci - pure, clean, unsullied, holy; a pure person