Exodus 29:5

“You shall make holy garments for Aaron your brother, for glory and for beauty.

Then Moses had Aaron and his sons come near and washed them with water.

So they came near and carried them still in their tunics to the outside of the camp, as Moses had said.

“When the priests enter, then they shall not go out into the outer court from the sanctuary without laying there their garments in which they minister, for they are holy. They shall put on other garments; then they shall come near to that which is for the people.”