Leviticus 21:19

Say to Aaron, 'None of your seed throughout their generations who has a blemish, may approach to offer the bread of his God.

For whatever man he is that has a blemish, he shall not draw near: a blind man, or a lame, or he who has a flat nose, or any deformity,

or hunchbacked, or a dwarf, or one who has a defect in his eye, or an itching disease, or scabs, or who has damaged testicles;

no man of the seed of Aaron the priest who has a blemish, shall come near to offer the offerings of Yahweh made by fire. Since he has a blemish, he shall not come near to offer the bread of his God.