Śatapatha Brāhmaṇa ("of a hundred paths") 6.3.1.16

6.3.1.16

yuñjate mana uta yuñjate dhiya iti | manaścaivaitatprāṇāścaitasmai karmaṇe yuṅkte viprā viprasyeti prajāpatirvai vipro devā viprā bṛhato vipaścita iti prajāpatirvai bṛhanvipaścidvi hotrā dadha iti yadvā eṣa cīyate tadeṣa hotrā vidhatte cite hyetasminhotrā adhividhīyante vayunāvidityeṣa hīdaṃ vayunamavindadeka idityeko hyeṣa idaṃ sarvaṃ vayunamavindanmahī devasya savituḥ pariṣṭutiriti mahatī devasya savituḥ pariṣṭutirityetat

[Vâg. S. XI, 4] 'They harness the mind, and they harness the thoughts,'--for both the mind and the vital airs he harnesses for this holy work;--'the priests of the priest,'--the priest is Pragâpati, and the priests are the gods;--'of the great inspirer of devotion,'--the great inspirer of devotion is Pragâpati;--'he hath assigned the priestly offices,'--now when he (Agni-Pragâpati) is built up, then he assigns the priestly offices, for the priestly offices are assigned over the built-up (fire-altar);--'the finder of rites,'--for he indeed found this rite;--'he alone,' for he alone found this whole holy rite;--'mighty is the praise of the god Savitri,'--that is, 'great is the praise of the god Savitri.'