Exodus 28:42-43

Holman Christian Standard Bible

⁴² Make them linen undergarments^(A) to cover their naked bodies; they must extend from the waist^[a] to the thighs. ⁴³ These must be worn by Aaron and his sons whenever they enter the tent of meeting or approach the altar to minister in the sanctuary area, so that they do not incur guilt^(B) and die. This is to be a permanent statute^(C) for Aaron and for his future descendants.