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Regulations concerning Priests
17“Speak to Aaron, saying, ‘None of your descendants throughout their generations who has an impairment shall approach to offer the food of his God. 18For no one who has an impairment shall approach: a man who is blind, or one who limps, or one who has a slit nose, or one with any conspicuous feature, 19or someone who has a broken foot or broken hand, 20or a contorted back, or one who is a dwarf, or has a spot in his eye, or a festering rash or scabs, or crushed testicles. 21No man among the descendants of Aaron the priest who has an impairment is to come forward to offer the Lord’s offerings by fire; since he has an impairment, he shall not come forward to offer the food of his God. 22He may eat the food of his God, both of the most holy and of the holy, 23only he shall not come up to the veil or approach the altar, since he has an impairment, so that he does not profane My sanctuaries. For I am the Lord who sanctifies them.’ ” 24So Moses spoke to Aaron and to his sons and to all the sons of Israel.
Leviticus 21:17-24 (NASB)