Exodus 28:39-43

“Weave the tunic of fine linen. Make the turban of fine linen. The sash will be the work of an embroiderer. Make tunics, sashes, and hats for Aaron’s sons to express glory and beauty. Dress your brother Aaron and his sons in them. Anoint, ordain, and dedicate them to serve me as priests. “Make linen underwear to cover their nakedness from waist to thigh. Aaron and his sons must wear it whenever they enter the Tent of Meeting or approach the Altar to minister in the Holy Place so that they won’t incur guilt and die. This is a permanent rule for Aaron and all his priest-descendants.”