Śatapatha Brāhmaṇa ("of a hundred paths") 8.2.3.2

8.2.3.2

prāṇabhṛta upadadhāti | prāṇo vai vāyurvāyumevāsminnetaddadhāti retaḥsicorvelayeme vai retaḥsicāvanayostadvāyuṃ dadhāti tasmādanayorvāyuḥ sarvata upadadhāti sarvatastadvāyuṃ dadhāti tasmātsarvato vāyuḥ sarvataḥ samīcīḥ sarvatastatsamyañcaṃ vāyuṃ dadhāti tasmātsarvataḥ samyaṅbhūtvā sarvābhyo digbhyo vāti diśyā anūpadadhāti dikṣu tadvāyuṃ dadhāti tasmātsarvāsu dikṣu vāyuḥ

He lays down the Prânabhrits,--wind, doubtless, is breath: it is wind (air) he thus bestows Upon him (Agni). On the range of the Retahsik (they are placed); for the Retahsik are these two (worlds): it is within these two (worlds) that he thus places the wind; whence there is wind within these two (worlds). He places them on every side: he thus places wind on all sides, whence the wind is everywhere. [He places them so as] on every side to run in the same direction: he thus makes the wind everywhere (to blow) in the same direction, whence, having become united, it blows from all quarters in the same direction. He lays them down alongside of the regional (bricks): he thereby places the wind in the regions, whence there is wind in all the regions.