Leviticus 16:5

16:5 He must also take two male goats from the congregation of the Israelites for a sin offering and one ram for a burnt offering.

Leviticus 16:7-9

16:7 He must then take the two goats and stand them before the Lord at the entrance of the Meeting Tent, 16:8 and Aaron is to cast lots over the two goats, one lot for the Lord and one lot for Azazel. 16:9 Aaron must then present the goat which has been designated by lot for the Lord, and he is to make it a sin offering,

Leviticus 23:19

23:19 You must also offer one male goat for a sin offering and two yearling lambs for a peace offering sacrifice,