Śatapatha Brāhmaṇa ("of a hundred paths") 5.3.4.12

5.3.4.12

atha yaḥ syandamānānāṃ sthāvaro hrado bhavati | pratyātāpe tā gṛhṇāti sūryatvacasa stha rāṣṭradā rāṣṭram me datta svāhā sūryatvacasa stha rāṣṭradā rāṣṭramamuṣmai datteti tābhirabhiṣiñcati varcasaivainametadabhiṣiñcati sūryatvacasamevainametatkaroti varuṇyā vā etā āpo bhavanti yāḥ syandamānānāṃ na syandante varuṇasavo vā eṣa yadrājasūyaṃ tasmādetābhirabhiṣiñcatyetā vā ekā āpastā evaitatsambharati

Then what standing pool of flowing water there is in a sunny spot, that (water) he takes with (Vâg. S. X, 4), 'Sun-skinned ye are, bestowers of kingship: bestow ye kingship on me, hail!--Sun-skinned ye are, bestowers of kingship: bestow ye kingship on N.N.!' With that (water) he sprinkles: it is with lustre he thereby sprinkles him, and makes him sun-skinned. Now it is to Varuna that those waters belong which, (whilst being part) of flowing water, do not flow: and Varuna's quickening (sava) is that Râgasûya: therefore he sprinkles him therewith. This is one kind of water: it is that he now brings.