Śatapatha Brāhmaṇa ("of a hundred paths") 3.9.3.27

3.9.3.27

atha gṛhṇāti | samudrasya tvākṣityā unnayāmītyāpo vai samudro 'psvevaitadakṣitiṃ dadhāti tasmādāpa etāvati bhoge bhujyamāne na kṣīyante tadanvekadhanānunnayanti tadanu pānnejanān

He then takes (water) with, 'I draw thee up for the imperishableness of the ocean;' for the ocean is water; he thus confers imperishableness upon the waters; wherefore, in spite of so much food (and drink) being consumed, the waters are not diminished. Thereupon they draw (water in) the Ekadhana pitchers, and thereupon the vessels for washing the feet.