महाभारतः mahābhārataḥ - book-3, chapter-82, verse-124

तत्र मासं वसेद्वीर कौशिक्यां भरतर्षभ ।
अश्वमेधस्य यत्पुण्यं तन्मासेनाधिगच्छति ॥१२४॥

124. tatra māsaṁ vasedvīra kauśikyāṁ bharatarṣabha ,
aśvamedhasya yatpuṇyaṁ tanmāsenādhigacchati.

124. tatra māsam vaset vīra kauśikyām bharatarṣabha
aśvamedhasya yat puṇyam tat māsena adhigacchati

124. There, O hero, O best of the Bharatas, one should dwell for a month in the Kauśikī river; whatever merit is gained from an aśvamedha (horse sacrifice), that one obtains by dwelling there for a month.

Words meanings summery:

• तत्र (tatra) - in the lake of sage Kauśika mentioned in the previous verse (there, in that place)

• मासम् (māsam) - for a month

• वसेत् (vaset) - one should dwell, he would reside

• वीर (vīra) - O hero

• कौशिक्याम् (kauśikyām) - in the Kauśikī river, which flows near the lake of Kauśika (in the Kauśikī (river))

• भरतर्षभ (bharatarṣabha) - O best of the Bharatas

• अश्वमेधस्य (aśvamedhasya) - of the aśvamedha (horse sacrifice)

• यत् (yat) - which, whatever

• पुण्यम् (puṇyam) - merit, virtue, good deed

• तत् (tat) - that (merit)

• मासेन (māsena) - by a month, in a month

• अधिगच्छति (adhigacchati) - obtains, attains, goes to

Words meanings and morphology

तत्र (tatra) - in the lake of sage Kauśika mentioned in the previous verse (there, in that place)

(indeclinable)

मासम् (māsam) - for a month

(noun)

Accusative, masculine, singular of māsa

māsa - month

Note: Used adverbially to denote duration

वसेत् (vaset) - one should dwell, he would reside

(verb)

3rd person , singular, active, optative (vidhiliṅ) of vas

Root: vas (class 1)

वीर (vīra) - O hero

(noun)

Vocative, masculine, singular of vīra

vīra - hero, warrior, brave man

कौशिक्याम् (kauśikyām) - in the Kauśikī river, which flows near the lake of Kauśika (in the Kauśikī (river))

(proper noun)

Locative, feminine, singular of kauśikī

kauśikī - the name of a river, also called Kośī

भरतर्षभ (bharatarṣabha) - O best of the Bharatas

(noun)

Vocative, masculine, singular of bharatarṣabha

bharatarṣabha - chief of the Bharatas, best among the Bharatas (an epithet)

Compound type : tatpuruṣa (bharata+ṛṣabha)

• bharata – a descendant of Bharata; a member of the Bharata clan
  proper noun (masculine)
• ṛṣabha – bull; best, chief, excellent
  noun (masculine)

अश्वमेधस्य (aśvamedhasya) - of the aśvamedha (horse sacrifice)

(noun)

Genitive, masculine, singular of aśvamedha

aśvamedha - horse sacrifice; a significant Vedic ritual

Compound type : tatpuruṣa (aśva+medha)

• aśva – horse
  noun (masculine)
• medha – sacrifice, oblation
  noun (masculine)

यत् (yat) - which, whatever

(pronoun)

Nominative, neuter, singular of yad

yad - who, which, what, whatever

Note: Agrees with puṇyam

पुण्यम् (puṇyam) - merit, virtue, good deed

(noun)

Nominative, neuter, singular of puṇya

puṇya - merit, virtue, righteousness, good deed

तत् (tat) - that (merit)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Refers to the puṇyam (merit)

मासेन (māsena) - by a month, in a month

(noun)

Instrumental, masculine, singular of māsa

māsa - month

Note: Denotes means or duration

अधिगच्छति (adhigacchati) - obtains, attains, goes to

(verb)

3rd person , singular, active, present indicative (laṭ) of adhigam

Prefix: adhi

Root: gam (class 1)