महाभारतः mahābhārataḥ - book-9, chapter-37, verse-19

गयस्य यजमानस्य गयेष्वेव महाक्रतुम् ।
आहूता सरितां श्रेष्ठा गययज्ञे सरस्वती ॥१९॥

19. gayasya yajamānasya gayeṣveva mahākratum ,
āhūtā saritāṁ śreṣṭhā gayayajñe sarasvatī.

19. gayasya yajamānasya gayeṣu eva mahākratum
āhūtā saritām śreṣṭhā gayayajñe sarasvatī

19. sarasvatī saritām śreṣṭhā gayasya yajamānasya
mahākratum gayeṣu eva gayayajñe āhūtā

19. The foremost of rivers, Sarasvatī, was indeed invited to the great Vedic ritual (mahākratu) of Gaya, the performer of Vedic rituals (yajamāna), specifically in Gaya itself, at Gaya's Vedic ritual (yajña).

Words meanings summery:

• गयस्य (gayasya) - of Gaya (a specific person) (of Gaya)

• यजमानस्य (yajamānasya) - of Gaya, who is the performer of Vedic rituals (of the performer of Vedic rituals, of the host)

• गयेषु (gayeṣu) - in Gaya (the place) (in Gaya, among the Gayas)

• एव (eva) - indeed, specifically (indeed, just, only)

• महाक्रतुम् (mahākratum) - the great Vedic ritual (yajña) (the great Vedic ritual)

• आहूता (āhūtā) - having been invited (invited, called)

• सरिताम् (saritām) - of rivers

• श्रेष्ठा (śreṣṭhā) - the foremost (of rivers) (best, foremost, most excellent)

• गययज्ञे (gayayajñe) - at Gaya's Vedic ritual (yajña) (at Gaya's Vedic ritual)

• सरस्वती (sarasvatī) - The river Sarasvatī (Sarasvatī (name of a river/goddess))

Words meanings and morphology

गयस्य (gayasya) - of Gaya (a specific person) (of Gaya)

(proper noun)

Genitive, masculine, singular of gaya

gaya - name of a king, name of a mountain, household, family

यजमानस्य (yajamānasya) - of Gaya, who is the performer of Vedic rituals (of the performer of Vedic rituals, of the host)

(noun)

Genitive, masculine, singular of yajamāna

yajamāna - sacrificer, host, worshipper, performer of Vedic rituals

Present Active Participle

Derived from root `yaj` (to worship, sacrifice) with `śānac` suffix.

Root: yaj (class 1)

गयेषु (gayeṣu) - in Gaya (the place) (in Gaya, among the Gayas)

(proper noun)

Locative, masculine, plural of gaya

gaya - name of a king, name of a place, household, family

एव (eva) - indeed, specifically (indeed, just, only)

(indeclinable)

महाक्रतुम् (mahākratum) - the great Vedic ritual (yajña) (the great Vedic ritual)

(noun)

Accusative, masculine, singular of mahākratu

mahākratu - great Vedic ritual, great effort

Compound type : karmadhāraya (mahā+kratu)

• mahā – great, large, mighty
  adjective
• kratu – Vedic ritual, sacrifice, action, power, intelligence, will
  noun (masculine)
  Root: kṛ (class 8)

आहूता (āhūtā) - having been invited (invited, called)

(adjective)

Nominative, feminine, singular of āhūta

āhūta - invited, called, summoned

Past Passive Participle

Derived from root `hvā` (to call) with prefix `ā-` and suffix `kta`.

Prefix: ā

Root: hvā (class 1)

Note: Agrees with Sarasvatī.

सरिताम् (saritām) - of rivers

(noun)

Genitive, feminine, plural of sarit

sarit - river, stream

Root: sṛ (class 1)

श्रेष्ठा (śreṣṭhā) - the foremost (of rivers) (best, foremost, most excellent)

(adjective)

Nominative, feminine, singular of śreṣṭha

śreṣṭha - best, excellent, supreme, chief

Superlative degree of `praśasya` (praise-worthy).

Note: Agrees with Sarasvatī.

गययज्ञे (gayayajñe) - at Gaya's Vedic ritual (yajña) (at Gaya's Vedic ritual)

(noun)

Locative, masculine, singular of gayayajña

gayayajña - Vedic ritual of Gaya

Compound type : ṣaṣṭhī-tatpuruṣa (gaya+yajña)

• gaya – name of a king, name of a place
  proper noun (masculine)
• yajña – Vedic ritual, sacrifice, worship
  noun (masculine)
  Root: yaj (class 1)

सरस्वती (sarasvatī) - The river Sarasvatī (Sarasvatī (name of a river/goddess))

(proper noun)

Nominative, feminine, singular of sarasvatī

sarasvatī - Sarasvatī (goddess of knowledge, wisdom, arts, and music, or the sacred river)

Note: Subject of the sentence (implied verb 'was').