Leviticus 16:8

16:8 and Aaron is to cast lots over the two goats, one lot for the Lord and one lot for Azazel.

Leviticus 16:10

16:10 but the goat which has been designated by lot for Azazel is to be stood alive before the Lord to make atonement on it by sending it away to Azazel into the wilderness.

Leviticus 16:26

16:26 and the one who sent the goat away to Azazel must wash his clothes, bathe his body in water, and afterward he may reenter the camp.