Śatapatha Brāhmaṇa ("of a hundred paths") 4.4.1.5

4.4.1.5

āgrayaṇādgṛhṇāti | mano ha vā asya savitātmāgrayaṇa ātmanyevaitanmano dadhāti prāṇo ha vā asya savitātmāgrayaṇa ātmanyevaitatprāṇaṃ dadhāti

He draws it from the Âgrayana graha; for Savitri is his mind, and the Âgrayana is his body (or self): he thus puts the mind into the body. Savitri is his breath, and the Âgrayana is his body: he thus puts the breath into the body.