Śatapatha Brāhmaṇa ("of a hundred paths") 5.3.3.1

5.3.3.1

sa vai dīkṣate | sa upavasathe 'gnīṣomīyam paśumālabhate tasya vapayā pracaryāgnīsomīyamekādaśakapālam puroḍāśam nirvapati tadanu devasvāṃ havīṃṣi nirupyante

He performs the initiation ceremony. On the day of preparation he seizes the victim for Agni and Soma. Having performed the offering of the omentum thereof; he prepares a cake on eleven potsherds for Agni and Soma. Thereupon the offerings of the Divine Quickeners (Devasû) are prepared.