He is to wear the sacred linen tunic, with linen undergarments. He must tie a linen sash around him and put on the linen turban. These are holy garments, and he must bathe himself with water before he wears them.

Hebrews 10:22
let us draw near with a sincere heart in full assurance of faith, having our hearts sprinkled to cleanse us from a guilty conscience and our bodies washed with pure water.

Exodus 28:39
You are to weave the tunic with fine linen, make the turban of fine linen, and fashion an embroidered sash.

Exodus 28:42
Make linen undergarments to cover their bare flesh, extending from waist to thigh.

Exodus 30:20
Whenever they enter the Tent of Meeting or approach the altar to minister by presenting an offering made by fire to the LORD, they must wash with water so that they will not die.

Leviticus 16:23
Then Aaron is to enter the Tent of Meeting, take off the linen garments he put on before entering the Most Holy Place, and leave them there.

Leviticus 16:24
He is to bathe himself with water in a holy place and put on his own clothes. Then he must go out and sacrifice his burnt offering and the people's burnt offering to make atonement for himself and for the people.

Leviticus 16:32
The priest who is anointed and ordained to succeed his father as high priest shall make atonement. He will put on the sacred linen garments

Ezekiel 9:2
And I saw six men coming from the direction of the Upper Gate, which faces north, each with a weapon of slaughter in his hand. With them was another man clothed in linen who had a writing kit at his side. And they came in and stood beside the bronze altar.

Ezekiel 44:18
They are to wear linen turbans on their heads and linen undergarments around their waists. They must not wear anything that makes them perspire.

Ezekiel 44:19
When they go out to the outer court, to the people, they are to take off the garments in which they have ministered, leave them in the holy chambers, and dress in other clothes so that they do not transmit holiness to the people with their garments.

He shall put on the holy linen coat, and he shall have the linen breeches on his flesh, and shall be girded with a linen girdle, and with the linen turban shall he be attired: these are holy garments; therefore shall he wash his flesh in water, and so put them on.