Vayikra 21:23-24

Orthodox Jewish Bible

²³ Only he shall not go near unto the Parochet (curtain), nor come near unto the Mizbe’ach, because he hath a mum on him; that he profane not My Mikdash; for I Hashem do set them apart as kodesh.

²⁴ And Moshe told it unto Aharon, and to his Banim, and unto all the Bnei Yisroel.