Shatapatha Brahmana 10.4.3.11

10.4.3.11

sa yadagniṃ cinute etameva tadantakam mṛtyuṃ saṃvatsaram prajāpatimagnimāpnoti yaṃ devā āpnuvannetamupadhatte yathaivainamado devā upādadhata

But when he builds the fire-altar, he thereby gains Agni, Pragâpati, the Year, Death, the Ender, whom the gods gained; it is him he lays downy even as the gods thus laid him down.