There is a mention of fifteen rātri-muhūrta (ratri-muhurta; nocturnal moments) — such as, Prājāpatya (Prajapatya), Brāhma (Brahma), Vārhaspatya (Varhaspatya) and so on. Āgneya(Agneya) is one of them.

Vāyupurāṇa(66.43)