Śatapatha Brāhmaṇa ("of a hundred paths") 6.2.1.13

6.2.1.13

taddhaike āhuḥ | atraivaitaiḥ sarvaiḥ paśubhiryajeta yadvāyaiṣyattadyadetairatra sarvairyajeta tadevāgnerantam parīyāditi na tathā kuryāddevānāṃ taditādiyādatho pathastadiyādatho kiṃ tataḥ sambharedetāni vā etatkusindhānyetāścitīḥ sambharati tasmāttathā na kuryāt

Here now some say, 'It is at this (point of the performance) that he should offer up all those (five) victims; for had Pragâpati then offered up all of them, he would certainly have reached the end of the fire (altar): hence were he (the Sacrificer) now to offer up all those (victims) he would certainly reach the end of the fire (altar).' Let him not do so: he thus would stray from where the gods have gone, he would stray from the path;--and what would he then gather? For those same bodies, those layers, he gathers: let him therefore not do so.