Leviticus 21:17-21

17“Say to Aaron, ‘For the generations to come, none of your descendants who has a physical defect may approach to offer the food of his God.

18No man who has any defect may approach—no man who is blind, lame, disfigured, or deformed; 19no man who has a broken foot or hand, 20or who is a hunchback or dwarf, or who has an eye defect, a festering rash, scabs, or a crushed testicle.

21No descendant of Aaron the priest who has a defect shall approach to present the food offerings to the LORD. Since he has a defect, he is not to come near to offer the food of his God.