Śatapatha Brāhmaṇa ("of a hundred paths") 1.9.3.1

1.9.3.1

saṃsthite yajñe | dakṣiṇataḥ parītya pūrṇapātraṃ ninayati tathā hyudagbhavati tasmāddakṣiṇataḥ parītya pūrṇapātraṃ ninayati devaloke me 'pyasaditi vai yajate yo yajate so 'syaiṣa yajño devalokamevābhipraiti tadanūcī dakṣiṇā yāṃ dadāti saiti dakṣiṇāmanvārabhya yajamānaḥ

The sacrifice being now complete, he (the Adhvaryu) walks round (the fire) to the south, and pours out a vessel (of water); for thus it is (poured out) towards north: therefore he pours it out after walking round to the south, He who sacrifices, doubtless, sacrifices with a desire that he also may obtain a place in the world of the gods. That sacrifice of his then goes forth towards the world of the gods: after it follows the fee which he gives (to the priests), and holding on to the priests' fee (follows) the sacrificer.