Leviticus 21:21-23

²¹Whoever of the seed of Aaron the priest has a blemish on him, shall not draw near to offer sacrifices to your God, because he has a blemish on him; he shall not draw near to offer the gifts of God.

²²The gifts of God are most holy, and he shall eat of the holy things.

²³Only he shall not approach the veil, and he shall not draw near to the altar, because he has a blemish; and he shall not profane the sanctuary of his God, for I am the Lord that sanctifies them.