Ṣaḍviṃśa Brāhmaṇa ("26th" book) 31.8-2

Ṣaḍviṃśabrāhmaṇa 31.8-2

tatprakāradarśanamiti | agnirbhe hotetyādayo ye mantrāste yājamānāḥ | tathā
cānukalpe darśitam | prathamaḥ savanamukhīyo'gnirme hoteti yājamānamiti