Śatapatha Brāhmaṇa ("of a hundred paths") 8.2.3.5

8.2.3.5

apasyā upadadhāti | āpo vai vṛṣṭirvṛṣṭimevāsminnetaddadhāti retaḥsicorvelayeme vai retaḥsicāvanayostadvṛṣṭiṃ dadhāti tasmādanayorvarṣati sarvata upadadhāti sarvatastadvṛṣṭiṃ dadhāti tasmātsarvato varṣati sarvataḥ samīcīḥ sarvatastamīcīṃ vṛṣṭiṃ dadhāti tasmātsarvataḥ samyaṅbhūtvā sarvābhyo digbhyo varṣati vāyavyā anūpadadhāti vāyau tadvṛṣṭiṃ dadhāti tasmādyāṃ diśaṃ vāyureti tāṃ diśaṃ vṛṣṭiranveti

He put on the Apasyâs; for rain is water (ap); it is rain he thereby puts into it (the altar; or into him, Agni). On the range of the Retahsik (he places them), for, the Retahsik being these two (worlds), it is on these two (worlds) that he thereby bestows rain, whence it rains therein. He places them on every side: he thus puts rain everywhere, whence it rains everywhere. [He places them] so as everywhere to run in the same direction: he thereby bestows rain (falling) everywhere in the same direction, whence the rain falls everywhere, and from all quarters, in the same direction. He places them alongside of those referring to the wind: he thereby puts rain into the wind, whence rain follows to whatever quarter the wind goes.