vi. 4. 8.

The gods said to Mitra, 'Let us slay Soma, the king'; he replied, 'Not I; for I am the friend of all'; they answered, 'Still we will slay him'; he replied, 'Let me choose a boon; let them mix the Soma for me with milk.' Therefore they mix with milk (the Soma) for Mitra and Varuna. From him cattle departed (saying), 'He that was a friend hath done a cruel deed'; a cruel deed as it were [1] does he do who sacrifices with Soma; from him cattle depart. In that he mixes with milk (the Soma) for Mitra and Varuna, he unites Mitra with cattle, and the sacrificer with cattle. Aforetime indeed was Mitra thus aware,' When I have done this cruel deed, cattle will depart from me'; therefore he chose thus. The gods said to Varuna, 'With thee as helper we will slay Soma, the king'; he replied, 'Let me choose a boon, for me [2] and Mitra together let this (cup) be drawn.' Therefore it is drawn for Mitra and Varuna together; therefore with a king as helper they slay a king, with a Vaiçya a Vaiçya, with a Çudra a Çudra. This was not day or night, but undiscriminated; the gods said to Mitra and Varuna, 'Make this to shine forth for us'; they replied, 'Let us choose a boon; let one cup only be drawn before ours.' Therefore the cup for Indra and Vayu is drawn before that for Mitra and Varuna, for the Upançu and the Antaryama (cups) are expiration and inspiration. Mitra produced the day, Varuna the night; then indeed did this shine forth; in that (a cup) is drawn for Mitra and Varuna, (it is) for shining forth.