Skandapurana 5.202.12

5.202.12

tato'gniśaraṇaṃ gatvā saṃtarpya ca hutāśanam ..
pañcavaktreṇa maṃtreṇa dattvā pūrṇāhutiṃ tataḥ..
viprebhyo dakṣiṇāṃ dadyātsvaśaktyā bhojanānvitām .. 12 ..

Then, having gone to the fire sanctuary and propitiated the fire, / having offered the final full oblation with the five-faced mantra, / he should give a sacrificial fee to the brahmins according to his ability, accompanied by a meal.