Agni is both equally the sacred fire plus the deity of that fire who transmits oblations to one other deities. Consequently, this mantra is recited even though invoking the deity Agni in the form of fire as witness on the vow. Agne vratapate vrataṃ cariṣyāmi (Vājasaneyī-Saṃhitā on the Śukla [White] https://iodirectory.com/listings13316093/how-beej-mantra-can-save-you-time-stress-and-money