Leviticus 16:8

Verse Leviticus 16:8. Aaron shall cast lots upon the two goats] The Jews inform us that there were two lots made either of wood, stone, or any kind of metal. On one was written לשם LASHSHEM, for the NAME, i. e., יהוה JEHOVAH, which the Jews will neither write nor pronounce: on the other was written לעזאזל LAAZAZEL, for the SCAPE-GOAT: then they put the two lots into a vessel which was called קלפי kalpey, the goats standing with their faces towards the west. Then the priest came, and the goats stood before him, one on the right hand and the other on the left; the kalpey was then shaken, and the priest put in both his hands and brought out a lot in each: that which was in his right hand he laid on the goat that was on his right, and that in his left hand he laid on the goat that was on his left; and according to what was written on the lots, the scape-goat and the goat for sacrifice were ascertained. See the Mishna, in Tract. Yoma.

The determining this solemn business by lot, the disposal of which is with the Lord, Proverbs 16:33, shows that God alone was to select and point out the person by whom this great atonement was to be made; hence he says: Behold I lay in Zion a stone, elect (that is, chosen by himself) and precious - of infinite value.