Leviticus 16:1-6

¹And the Lord spoke to Moses after the two sons of Aaron died in bringing strange fire before the Lord, so they died.

²And the Lord said to Moses, Speak to Aaron thy brother, and let him not come in at all times into the holy place within the veil before the propitiatory, which is upon the ark of the testimony, and he shall not die; for I will appear in a cloud on the propitiatory.

³Thus shall Aaron enter into the holy place; with a calf of the herd for a sin offering, and having a ram for a whole burnt offering.

⁴And he shall put on the consecrated linen tunic, and he shall have on his flesh the linen drawers, and shall gird himself with a linen girdle, and shall put on the linen cap, they are holy garments; and he shall bathe all his body in water, and shall put them on.

⁵And he shall take of the congregation of the children of Israel two kids of the goats for a sin offering, and one lamb for a whole burnt offering.

⁶And Aaron shall bring the calf for his own sin offering, and shall make atonement for himself and for his house.