Śatapatha Brāhmaṇa ("of a hundred paths") 5.3.4.10

5.3.4.10

atha nadīpatiṃ gṛhṇāti | apām patirasi rāṣṭradā rāṣṭram me dehi svāhāpām patirasi rāṣṭradā rāṣṭramamuṣmai dehīti tābhirabhiṣiñcatyapāṃ vā eṣa patiryannadīpatirviśāmevainametatpatiṃ karotyetā vā ekā āpastā evaitatsambharati

He then takes the lord of rivers (sea-water) with, 'Thou art the lord of waters, a bestower of kingship: bestow thou kingship on me, hail!--Thou art the lord of waters, a bestower of kingship: bestow thou kingship on N.N.!' With that (water) he sprinkles him; and that lord of rivers (the ocean) being the same as the lord of waters, he thereby makes him (the king) the lord of the people. This is one kind of water: it is that he now brings.