Matsya Purana 59.13

59.13

ṛgyajuḥ sāmamantraiśca vāruṇairabhitastathā..
taireva kumbhaiḥ snapanaṃ kuryāt brāhmaṇapuṅgavaḥ.. 59.11 ..

Then the trees should be watered with (the water contained in) the copper pitchers, after reciting the Mantras of the Ṛik, Yaju, and Sâma, addressed to Varuṇa, accompanied by music and song.—12.