Shatapatha Brahmana 5.5.4.25

5.5.4.25

so 'nvāha | yuvaṃ surāmamaśvinā namucāvāsure sacā vipipānā subhaspatī indraṃ karmasvāvatamityāśrāvyāhāśvinau sarasvatīmindraṃ sutrāmāṇaṃ yajeti

He recites (Vâg. S. X, 33; Rik S. X, 131, 4), 'Ye, O Asvins, lords of splendour, having quaffed the cheering (Soma) together with Namuki, the Âsura, helped Indra in his deeds!' Having called for the Sraushat, he says, 'Pronounce the offering prayer to the Asvins, to Sarasvatî, and to Indra Sutrâman!'