YV 5.2a

The New and Full Moon Sacrifices a Viçvarupa, son of Tvastr, was the domestic priest of the gods, and the sister's son of the Asuras. He had three heads, one which drank Soma, one Sura, and one which ate food. He promised openly the share to the gods, secretly to the Asuras. Men promise openly the share to every one; if they promise any one secretly, his share is indeed promised. Therefore Indra was afraid (thinking), 'Such an one is diverting the sovereignty (from me).' He took his bolt and smote off his heads. (The head) which drank Soma [1] became a hazelcock; (the head) which drank Sura a sparrow; (the head) which ate food a partridge. He seized with his hand the guilt of slaying him, and bore it for a year. Creatures called out upon him, 'Thou art a Brahman slayer.' He appealed to the earth, 'Take a third part of my guilt.' She said, 'Let me choose a boon. I deem that I shall be overcome through digging. Let me not be overcome by that.' He replied, 'Before [2] a year is out it will grow up for thee.' Therefore before the year is out the dug-out portion of earth grows up again, for that was what she chose as a boon. She took a third of his guilt. That became a natural fissure; therefore one who has piled up a fire-altar and whose deity is faith should not choose a natural fissure, for that is the colour of guilt. He appealed to the trees, 'Take a third part of my guilt.' They said, 'Let us choose a boon. We deem that we shall be overcome through pruning [3]. Let us not be overcome by that.' He replied, 'From pruning shall more (shoots) spring up for you.' Therefore from the pruning of trees more (shoots) spring up, for that was what they chose as a boon. They took a third part of his guilt, it became sap; therefore one should not partake of sap, for it is the colour of guilt. Or rather of the sap which is red or which comes from the pruning one should not partake [4], but of other sap at will. He appealed to a concourse of women, 'Take the third of my guilt.