Śatapatha Brāhmaṇa ("of a hundred paths") 4.4.5.20

4.4.5.20

etadaṅgirasāmayanam | ato 'nyataratkṛtvā yasminkumbha ṛjīṣam bhavati tam praplāvayati samudre te hṛdayamapsvantarityāpo vai samudro raso vā āpastadasminnetaṃ rasaṃ dadhāti tadenametena rasena saṃgamayati tadenamato janayati sa enaṃ jāta eva sañjanayati saṃ tvā viśantvoṣadhīrutāpa iti tadasminnubhayaṃ rasaṃ dadhāti yaścauṣadhiṣu yaścāpsu yajñasya tvā yajñapate sūktoktau namovāke vidhema yatsvāheti tadyadeva yajn=asya sādhu tadevāsminnetaddadhāti

This is the course of the Aṅgiras. Having performed the offerings either way, (the Adhvaryu) makes the pot, in which the husks are, float with (Vâg. S. VIII, 25), 'In the ocean, in the waters, is thy heart (O Soma)'--for the ocean is the waters, and water is sap: that sap he now puts into him (Soma), and thus he unites him with that sap, and produces him therefrom; and he (Soma), even when produced, produces him (the sacrificer);--'May the plants and the waters unite with thee!'--thereby he puts two kinds of sap into him, that which is in plants, and that which is in water,--'that we may serve thee, O lord of the sacrifice, in the singing of praises and the utterance of worship, with Svâhâ!' Whatever is good in the sacrifice, that he thereby puts into him.