Shatapatha Brahmana 4.1.1.13

4.1.1.13

sa gṛhṇāti | madhumatīrna iṣaṣkṛdhīti rasamevāsminnetaddadhāti svadayatyevainametaddevebhyastasmādeṣa hato na pūyatyatha yajjuhoti saṃsthāpayatyevainametat

He draws (the juice) with, 'Make thou our draughts sweet!' whereby he imbues him (Soma) with sap, and renders him palatable for the gods: hence, when slain, he does not become putrid. And when he offers (that graha) he thereby completely establishes him.