Leviticus 16:5-8

“Aaron must take from the people of Israel two male goats for a sin offering and one male sheep for a burnt offering. Then he will offer the bull for the sin offering for himself to remove sins from him and his family so they will belong to the LORD. “Next Aaron will take the two goats and bring them before the LORD at the entrance to the Meeting Tent. He will throw lots for the two goats—one will be for the LORD and the other for the goat that removes sin.