Śatapatha Brāhmaṇa ("of a hundred paths") 1.7.1.3

1.7.1.3

atha mātṛbhirvatsāntsamavārjanti | sa vatsaṃ śākhayopaspṛśati vāyava sthetyayaṃ vai vāyuryo 'yam pavata eṣa vā idaṃ sarvam prapyāyati yadidaṃ kiṃ ca varṣatyeṣa vā etāsām prapyāyayitā tasmādāha vāyava sthetyupāyava sthetyu haika āhurūpa hi dvitīyo 'yatīti tadu tathā na brūyāt

They then let the calves join their mothers. He thereupon touches (each) calf (in order to drive it away from the cow), with the formula (Vâg. S. I, 1 c), 'The winds are ye!'--for, indeed, it is this wind that here blows, it is this (wind) that makes swell all the rain that falls here; it is it that makes those (cows) swell; and for this reason he says 'the winds are ye!' Some people add here the formula, 'Going near are ye!' but let him not say this, because thereby another (an enemy) approaches (the sacrificer).