Some (law givers) prescribe the sacrifice called Prajapatya (of which god Brahma is the presiding deity, prior to a twice-born embracing renunciation). But (though thus prescribed) he may not do so. He shall only perform the sacrifice Agneyi (whose presiding deity is Agni, the god of fire). For Agni is the vital breath (Prana). Thereby he helps (strengthens) the vital breath. (Then) he shall perform the Traidhataviya sacrifice (whose presiding deity is the god Indra). By this sacrifice the three vital fluids (become strong like fire), namely the Sattva (semen), Rajas (blood) and Tamas (the dark one). (Having performed the sacrifice in the prescribed manner he shall smell the holy fire, reciting the following mantra): ‘Oh Fire, this (vital breath) is your source; as you are born at the proper time (of the year) you put on effulgence. Knowing him (the Atman, your ultimate source) may you merge (with the Prana, your source). May you increase our wealth (of transcendent knowledge)’. So, reciting the mantra he shall smell the fire. This is the source of fire, this vital air. ‘(May you) go unto fire (your source). Svaha’. Thus, alone the mantra says.