Śatapatha Brāhmaṇa ("of a hundred paths") 6.6.3.7

6.6.3.7

athaitā uttarāḥ pālāśyo bhavanti | brahma vai palāśo brahmaṇaivainametatsaminddhe yadveva pālāśyaḥ somo vai palāśa eṣo ha paramāhutiryatsomāhutistāmasminnetajjuhīti tayainametatprīṇāti

The remaining (kindling-sticks) are of palâsa wood (butea frondosa);--the Palâsa tree is the Brahman, it is by the Brahman he thus kindles him (Agni). And, again, why they are palâsa ones--;the Palâsa tree is Soma, and he, Soma, doubtless is the supreme offering: it is that he now offers on this (fire), and by that he gratifies him (Agni).