Leviticus 16:2-4

New Revised Standard Version Catholic Edition

² The Lord said to Moses:

Tell your brother Aaron not to come just at any time into the sanctuary inside the curtain before the mercy seat^[a] that is upon the ark, or he will die; for I appear in the cloud upon the mercy seat.^{[b] 3} Thus shall Aaron come into the holy place: with a young bull for a sin offering and a ram for a burnt offering. ⁴ He shall put on the holy linen tunic, and shall have the linen undergarments next to his body, fasten the linen sash, and wear the linen turban; these are the holy vestments. He shall bathe his body in water, and then put them on.