Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 27.8.5

27.8.5

sa ha vātam āptvā śarīrān nirahan /

the sacrificers. ‘O breath obtainer, that hear the call’ (he says); the breath obtainer is Indra, for he having obtained the breath goes round seeking bodies. (Now the) Adhvaryu; he offers in the Gārhapatya two libations to Prajāpati, without mention (of the deity); the Gārhapatya is Prajāpati; the Stotra and Çastra end with the two libations; the Stotra is completed; the Çastra is completed; the discussion of the Brahman is completed. Moreover they may if they will offer a sacrifice, and take food. Here is Vena. These are obviously the bodies of Prajāpati; them let the Hotṛ recite.