Shatapatha Brahmana 14.1.4.12

14.1.4.12

atra prāvīranu vāṃ devavītaya iti aśvināvevaitadāhāśvinau vā etadyajñasya śiraḥ pratyadhattāṃ tāvevaitatprīṇāti tasmādāhātra prāvīranu vām devavītaya iti

'Give thy countenance hereafter to the divine feast of you two,'--it is with regard to the two Asvins that he says this, for it was the Asvins that then restored the head of the sacrifice: it is them he thus pleases, and therefore he says, 'Give thy countenance hereafter to the divine feast of you two.'