Shatapatha Brahmana 6.6.1.22

6.6.1.22

tānyu haike | ukhāyāmevaitānyaudgrabhaṇāni juhvati kāmebhyo vā etāni hūyanta ātmo eṣa yajamānasya yadukhātmanyajamānasya sarvānkāmānpratiṣṭhāpayāma iti na tathā kuryādetasya vai yajñasya saṃsthitasyaitāsāmāhutīnāṃ yo rasastadetadarciryaddīpyate tadyatsaṃsthite yajñe huteṣvaudgrabhaṇeṣūkhām pravṛṇakti tadenāmeṣa yajña ārohati taṃ yajñam bibharti tasmātsaṃsthita eva yajñe huteṣvaudgrabhaṇeṣūkhām pravṛñjyāt

Now some offer these Audgrabhana libations into the fire-pan itself, saying, 'These, surely, are offered for (special) objects of desire, and that fire-pan is the Sacrificer's self: we thus secure for the Sacrificer's self all his objects of desire.' Let him not do so; for the fire which is kindled (in the fire-pan) is the essence of the completed sacrifice and of those libations, and when he puts the fire-pan on the fire, after the sacrifice has been completed and the Audgrabhanas offered, then the sacrifice mounts it (the pan), and it bears the sacrifice: let him, therefore, put the fire-pan on the fire only after the sacrifice is complete, and the Audgrabhanas have been offered.