Atharvaveda 5.1.9

5.1.9

ardhám ardhéna páyasā pr̥ṇakṣy ardhéna śuṣma vardhase amura |
áviṃ vr̥dhāma śagmíyaṃ sákhāyaṃ váruṇaṃ putrám ádityā iṣirám |
kaviśastā́ny asmai vápūṃṣy avocāma ródasī satyavā́cā ||9||

Half with half milk thou mixest (? pṛç); with half, O Asura (?), thou increasest [thy] vehemence (?). We have increased the helpful (çagmíya) companion, Varuṇa, lively (iṣirá) son of Aditi; poet-praised wondrous forms have we spoken for him—the (two) firmaments (ródasī) of true speech.