Leviticus 21:21-23

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. 22He may eat the most holy food of his God as well as the holy food, 23but because he has a defect, he must not go near the veil or approach the altar, so as not to desecrate My sanctuaries. For I am the LORD who sanctifies them.’”