Śatapatha Brāhmaṇa ("of a hundred paths") 11.4.4.7

11.4.4.7

atha yaḥ suśṛtena haviṣā yajate ādityena ha sa brahmaṇo dvāreṇa pratipadyate sa ādityena brahmaṇo dvāreṇa pratipadya brahmaṇaḥ sāyujyaṃ salokatāṃ jayati saiṣā haviṣaḥ samṛddhiḥ sa yo haivametāṃ haviṣaḥ samṛddhiṃ veda sarvasamṛddhena haivāsya haviṣeṣṭam bhavati

And he who offers with well-cooked sacrificial food, enters through the sun-door of the Brahman; and, by entering through the sun-door of the Brahman, he wins his union with, and participation in the world of, the Brahman. This, then, is the successful issue of the sacrificial food, and, verily, whosoever thus knows this to be the successful issue of the sacrificial food, by him offering is made with wholly successful sacrificial food.