Shatapatha Brahmana 3.6.3.1

3.6.3.1

sarvaṃ vā eṣo 'bhi dīkṣate | yo dīkṣate yajñaṃ hyabhi dīkṣate yajñaṃ hyevedaṃ sarvamanu taṃ yajñaṃ sambhṛtya yamimamabhi dīkṣate sarvamidaṃ visṛjate

Verily he who consecrates himself, consecrates himself for the sake of this All; for he consecrates himself for the sacrifice, and this All indeed results from the sacrifice; having prepared the sacrifice for which he consecrates himself, he now sets free (or produces) this All.