Agni

Agni is a deity whose tirtha on the Sarasvati is called Rathagni. He appears among the shrines Vidura resorted to at SB 3.1.22: 'pR^ithor athAgner asitasya vAyoH'.

Śrīmad Bhāgavata Mahāpurāṇa 3.1.22 — Sanskrit Wikisource (pinned chapter page; Devanagari from the cross-validated transcription in validation/sanskrit_skandha3.json)