Śatapatha Brāhmaṇa ("of a hundred paths") 3.3.4.24

3.3.4.24

tasminvācayati | namo mitrasya varuṇasya cakṣase maho devāya tadṛtaṃ saparyata dūre dṛśe devajātāya ketave divasputrāya sūryāya śaṃsateti nama evāsmā etatkaroti mitradheyamevainenaitatkurute

Thereon he makes (the sacrificer) say (Vâg. S. IV, 35; Rig-veda X; 37, 1); 'Homage be to the eye of Mitra and Varuna! perform ye diligently this holy service to the god! sing ye unto the far-seeing, god-born light, to Sûrya, the son of the sky!' Thereby he renders homage to it (the victim) and makes it a token of the covenant.