Shatapatha Brahmana 5.1.5.1

5.1.5.1

sa brahmā rathacakramadhirohati | nābhidaghna uddhitaṃ devasyāhaṃ savituḥ save satyasavaso bṛhaspateruttamaṃ nākaṃ ruheyamiti yadi brāhmaṇo yajate brahma hi bṛhaspatirbrahma hi brāhmaṇaḥ

Now when they run a race, he thereby wins this same (terrestrial) world. And when the Brahman sings a Sâman on the cart-wheel set up on (a post) reaching to his navel, he thereby wins the air-world. And when he erects the sacrificial post, he thereby wins the world of the gods. Hence that threefold performance.