Leviticus 16:4

4He shall put on athe holy linen coat and shall have the linen undergarment on his body, and he shall tie the linen sash around his waist, and wear the linen turban; these are the holy garments. bHe shall bathe his body in water and then put them on.

Leviticus 16:23-24

23“Then Aaron shall come into the tent of meeting and cshall take off the linen garments that he put on when he went into the Holy Place and shall leave them there. 24And he shall bathe his body in water in a holy place and put on his garments and come out and doffer his burnt offering and the burnt offering of the people and make atonement for himself and for the people.
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