Leviticus 21:18-21

18Any man who has a defect is not to draw near: no one blind or lame or disfigured or deformed,

19or a man who has a crippled foot or crippled hand

20or a hunchback or dwarf, or who has an eye defect or a rash or scabs, or who has damaged testicles.

21None of the offspring of Aaron the kohen who has a defect shall come near to present the offerings of Adonai made by fire. Since he has a defect, he is not to come near to offer the food of his God.