Shemot 28:42-43

Orthodox Jewish Bible

⁴² And thou shalt make them mikhnesei bahd (linen undergarments) to cover their nakedness; from the loins even unto the thighs they shall reach;

⁴³ And they shall be upon Aharon, and upon his banim, when they come in unto the Ohel Mo’ed, or when they come near unto the Mizbe’ach lesharet (to minister) in HaKodesh; that they incur not avon, and die; it shall be a chukkat olahm unto him and his zera after him.