Śatapatha Brāhmaṇa ("of a hundred paths") 3.4.2.5

3.4.2.5

te devāḥ | juṣṭāstanūḥ priyāṇi dhāmāni sārdhaṃ samavadadire te hocuretena naḥ sa nānāsadetena viṣvaṅyo na etadatikrāmāditi kasyopadraṣṭuriti tanūnaptureva śākvarasyeti yo vā ayam eṣa tanūnapācākvaraḥ so 'yam prajānāmupadraṣṭā praviṣṭastāvimau prāṇodānau

The gods laid down together their favourite forms and desirable powers, one after another, and said, 'Thereby he shall be away from us, he shall be scattered to the winds, whosoever shall transgress this (covenant) of ours!'--'Whose (is it) as witness?'--'Tanûnapât, the mighty!'--Now the mighty Tanûnapât indeed is yonder blowing (wind), he is the witness of living beings, entering thus as the in-breathing and out-breathing.