Leviticus 16:1-3

Revised Geneva Translation

16 Furthermore, the LORD spoke to Moses after the death of the two sons of Aaron, when they came before the LORD and died.

² And the LORD said to Moses, “Speak to Aaron, your brother, so that he does not come just at any time into the Holy Place, within the Veil, before the Mercy Seat, which is upon the Ark. So that he does not die. For I will appear in the cloud, upon the Mercy Seat.

³ “After this manner shall Aaron come into the Holy Place: with a young bullock for a Sin Offering, and a ram for a Burnt Offering.