Leviticus 21:17-23 NLT

17 "Tell Aaron that in all future generations, his descendants who have physical defects will not qualify to offer food to their God.
18 No one who has a defect may come near to me, whether he is blind or lame, stunted or deformed,
19 or has a broken foot or hand,
20 or has a humped back or is a dwarf, or has a defective eye, or has oozing sores or scabs on his skin, or has damaged testicles.
21 Even though he is a descendant of Aaron, his physical defects disqualify him from presenting offerings to the LORD by fire. Since he has a blemish, he may not offer food to his God.
22 However, he may eat from the food offered to God, including the holy offerings and the most holy offerings.
23 Yet because of his physical defect, he must never go behind the inner curtain or come near the altar, for this would desecrate my holy places. I am the LORD who makes them holy."