Leviticus 16:6-9

⁶and when he offereth a calf, and prayeth, for himself, and for his house,

⁷he shall make two goat bucks to stand before the Lord, in the door of the tabernacle of witnessing;

⁸and Aaron shall cast lot upon ever either, one lot to the Lord, and another lot to the goat that shall be sent out.

⁹Whose lot goeth out to the Lord, he shall offer it for sin;