Leviticus 16:3-4
3
"Herewith shall Aaron come into the sanctuary: with a young bull for a sin offering, and a ram for a burnt offering.
4
He shall put on the holy linen coat, and he shall have the linen breeches on his body, and shall put on the linen sash, and he shall be clothed with the linen turban. They are the holy garments. He shall bathe his body in water, and put them on.