'navindam yajna-sambharan purushavayavad rite' (SB 2.6.22); 'tam eva purusham yajnam tenaivayajam ishvaram' (SB 2.6.27).
Yajna
यज्ञ
The Yajna avatara is the Lord's incarnation in the Svayambhuva manvantara, born as the son of Ruchi and Akuti, who with Yama and the sura hosts protected that era (SB 1.3.12) — a personification of the Vedic ritual-deity 'Yajna'.
Śrīmad Bhāgavata Mahāpurāṇa 1.3.12 — Sanskrit Wikisource (pinned oldid=369178)
Yajna is the son of Ruchi. Source evidence (SB 1.3.12): Yajna was born of Ruchi: 'rucer yajno 'bhyajayata' (SB 1.3.12) — genitive father. Evidence: EXPLICIT.
Son Akuti HumanYajna is the son of Akuti. Source evidence (SB 1.3.12): Yajna was born in Akuti: 'akutyam' (SB 1.3.12). Evidence: EXPLICIT.
Seventh: 'saptama akutyam rucer yajno 'bhyajayata' (SB 1.3.12). Evidence: EXPLICIT.
With Yama and the sura hosts He protected Svayambhuva [Manu]'s authority: 'sa yamadyaih sura-ganair apat svayambhuvantaram' (SB 1.3.12). Evidence: EXPLICIT.