Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.6.6

4.6.6.6

sa yatrāha | brahmantstoṣyāmaḥ praśāstariti tadbrahmā japatyetaṃ te deva savitaryajñam prāhurbṛhaspataye brahmaṇe tena yajñamava tena yajñapatiṃ tena māmava stuta savituḥ prasava iti so 'sāveva bandhuretena nveva bhūyiṣṭhā ivopacaranti

When (the Prastotri) says, 'Brahman, we will chant, O Prasâstar!' then the Brahman mutters (Vâg.. S. II, 12), 'This thy sacrifice, O divine Savitar, have they announced unto Brihaspati (the lord of prayer), the Brahman: therefore speed the sacrifice, speed the lord of the sacrifice, speed me!--Praise ye at the impulse (prasava) of Savitri!' The significance is the same (as before). With this (text) must probably enter upon (the chant).