Exodus 28:39-43

You shall weave the tunic with fine linen. You shall make a turban of fine linen. You shall make a sash, the work of the embroiderer. “You shall make tunics for Aaron’s sons. You shall make sashes for them. You shall make headbands for them, for glory and for beauty. You shall put them on Aaron your brother, and on his sons with him, and shall anoint them, and consecrate them, and sanctify them, that they may minister to me in the priest’s office. You shall make them linen pants to cover their naked flesh. They shall reach from the waist even to the thighs. They shall be on Aaron and on his sons, when they go in to the Tent of Meeting, or when they come near to the altar to minister in the holy place, that they don’t bear iniquity, and die. This shall be a statute forever to him and to his offspring after him.