Leviticus 21:22-24 New King James Version (NKJV)

22. He may eat the bread of his God, both the most holy and the holy;

23. only he shall not go near the veil or approach the altar, because he has a defect, lest he profane My sanctuaries; for I the Lord sanctify them.’ ”

24. And Moses told it to Aaron and his sons, and to all the children of Israel.

Leviticus 21