Shatapatha Brahmana 14.3.2.18

14.3.2.18

saptaitā āhutayo bhavanti sapta vā ime śīrṣanprāṇāstānevāsminnetaddadhāti pūrṇāhutimuttamāṃ juhoti sarvam vai pūrṇaṃ sarveṇaivaitadbhiṣajyati yatkiṃ ca vivṛḍhaṃ yajñasya

These are seven oblations,--now seven in number are these vital airs in the head: it is them he thereby gives to it. He offers a last oblation of a full (spoon),--the full means everything: with everything he thus heals whatever has been unsuccessful in the sacrifice,--