Leviticus 21:19

16 And the Lord spoke to Moses, saying, 17 “Speak to Aaron, saying, None of your offspring throughout their generations who has a blemish may approach to offer the bread of his God. 18 For no one who has a blemish shall draw near, a man blind or lame, or one who has a mutilated face or a limb too long, 19 or a man who has an injured foot or an injured hand, 20 or a hunchback or a dwarf or a man with a defect in his sight or an itching disease or scabs or crushed testicles. 21 No man of the offspring of Aaron the priest who has a blemish shall come near to offer the Lord’s food offerings; since he has a blemish, he shall not come near to offer the bread of his God. 22 He may eat the bread of his God, both of the most holy and of the holy things,