Shatapatha Brahmana 2.2.4.7

2.2.4.7

sa hutvā prajāpatiḥ | pra cājāyatātsyataścāgnermṛtyorātmānamatrāyata sa yo haivaṃ vidvānagnihotraṃ juhotyetāṃ haiva prajātim prajāyate yāṃ prajāpatiḥ prājāyataivamu haivātsyato 'gnermṛtyorātmānaṃ trāyate

And Pragâpati, having performed offering, reproduced himself, and saved himself from Agni, Death, as he was about to devour him. And, verily, whosoever, knowing this, offers the Agnihotra, reproduces himself by offspring even as Pragâpati reproduced himself; and saves himself from Agni, Death, when he is about to devour him.