Exodus 39:27

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

“You shall weave the tunic of checkered work of fine linen, and you shall make a turban of fine linen, and you shall make a sash, the work of a weaver.

“For Aaron’s sons you shall make tunics; you shall also make sashes for them, and you shall make caps for them, for glory and for beauty.

‘And the priest shall put on his linen robe, and he shall put on undergarments next to his flesh; and he shall raise up the ashes to which the fire reduces the burnt offering on the altar and place them beside the altar.

“And it will be that when they enter at the gates of the inner court, they shall be clothed with linen garments; and wool shall not be on them while they are ministering in the gates of the inner court and in the house.