Śatapatha Brāhmaṇa ("of a hundred paths") 4.2.1.29

4.2.1.29

atha sampreṣyati | praitu hotuścamasaḥ pra brahmaṇaḥ prodgātṝṇām pra yajamānasya prayantu sadasyānāṃ hotrāṇāṃ camasādhvaryava upāvartadhvaṃ śukrasyābhyunnayadhvamiti sampraiṣa evaiṣa paryetya pratiprasthātādhvaryoḥ pātre saṃsravamavanayatyattra evaitadādyam baliṃ hārayati tamadhvaryurhotṛcamase 'vanayati bhakṣāya vaṣaṭkarturhi bhakṣaḥ prāṇo vai vaṣaṭkāraḥ so 'smādetadvaṣaṭkurvataḥ parāṅivābhūtprāṇo vai bhakṣastatprāṇam punarātmandhatte

He then gives directions:--'Let the Hotri's cup advance! let the Brahman's, the Chanters’, the Sacrificer's (cups) advance! Ye cup-bearers of the fire-priests, approach and fill up (the cups) with pure Soma!'--this is a composite direction. Having gone round (to behind the high altar) the Pratiprasthâtri pours his residue (of Soma) into the Adhvaryu's (Sukra) vessel; whereby he makes the food pay tribute to the eater. The Adhvaryu pours it into the Hotri's cup for drinking; because the draught belongs to the utterer of the Vashat; for the Vashat is the breath, and that breath has, as it were, departed from him while uttering the Vashat. Now the draught is breath: thus he puts that breath back into him.