Shatapatha Brahmana 14.1.2.21

14.1.2.21

athaināñcrapayati śṛtaṃ hi devānāmiṣṭkābhiḥ śrapayatyeta vā etadakurvata yathā-yathaitadyajñasya śiro'cidyata tābhirevainametatsamardhayati kṛtsnaṃ karoti tadu yenaiva suśṛtāḥ syustena śrapayedatha pacanamavadhāya mahāvīramavadadhāti makhāya tvā makhasya tvā śīrṣṇa ityasāveva bandhurevamitarau tūṣṇīm pinvane tūṣṇīṃ rauhiṇakapāle tāndivaivopavapeddivodvapedaharhi devānām

He then bakes them, for what is baked belongs to the gods. He bakes them by means of bricks, for they it was that did so on that occasion: just in accordance with the way in which the head of the sacrifice was there cut off, he now supplies and completes it with those (bricks), But, indeed, let him bake them with anything whereby they may become properly baked. Having laid down the fuel for baking, he puts down the Mahâvîra (pot), with, 'For Makha thee, for Makha's head thee!' the import of this is the same as before. In the same way the other two Mahâvîra (pots); silently the two milking-bowls, silently the two Rauhina-plates. By day he should bury them (in the hole), and by day he should take them out, for the day belongs to the gods.