Śatapatha Brāhmaṇa ("of a hundred paths") 8.1.1.7

8.1.1.7

atha dakṣiṇataḥ | ayaṃ dakṣiṇā viśvakarmetyayaṃ vai vāyurviśvakarmā yo 'yam pavata eṣa hīdaṃ sarvaṃ karoti tadyattamāha dakṣiṇeti tasmādeṣa dakṣiṇaiva bhūyiṣṭhaṃ vāti mano ha vāyurbhūtvā dakṣiṇatastasthau tadeva tadrūpamupadadhāti

And on the right (south) side with (Vâg. S. XIII, 55), 'This one on the right, the all-worker,'--the all-worker (visvakarman), doubtless, is this Vâyu (the wind) who blows here, for it is he that makes everything here; and because he speaks of him as (being) 'on the right,' therefore it is in the south that he blows most. Vâyu, indeed, having become the mind, remained in the right side (of the body): it is that form (part) he now bestows (on Agni).