Leviticus 21:13-23

13 "The anointed priest must marry a virgin.
14 He must never marry a widow, a divorced woman, a woman who has lost her virginity, or a prostitute. He may only marry a virgin from his own people.
15 He must not dishonor his children among his people because I, the LORD, set him apart as holy."
16 The LORD spoke to Moses,
17 "Tell Aaron: If any of your descendants (now or in future generations) has a physical defect, he must never bring food to offer to God.
18 Indeed, no one who has a physical defect may ever come near [the altar]. That means anyone who is blind or lame, who has a disfigured face, a deformity,
19 or a crippled hand or foot,
20 who is a hunchback or dwarf, who has defective sight, skin diseases, or crushed testicles.
21 If a descendant of the priest Aaron has a physical defect, he must never bring sacrifices by fire to the LORD. He has a defect. He must never bring food to offer to God.
22 He may eat the food of his God--what is holy and what is very holy.
23 However, he must never come up to the canopy or to the altar, since he has a physical defect. He must never dishonor the holy places because I, the LORD, set them apart as holy."