Leviticus 21:17-21

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.

18For 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,

19or a man who has an injured foot or an injured hand,

20or a hunchback or a dwarf or a man with a defect in his sight or an itching disease or scabs or crushed testicles.

21No 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.