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Instructions for the Priests
17“Give the following instructions to Aaron: In all future generations, none of your descendants who has any defect will qualify to offer food to his God. 18No one who has a defect qualifies, whether he is blind, lame, disfigured, deformed, 19or has a broken foot or arm, 20or is hunchbacked or dwarfed, or has a defective eye, or skin sores or scabs, or damaged testicles. 21No descendant of Aaron who has a defect may approach the altar to present special gifts to the Lord. Since he has a defect, he may not approach the altar to offer food to his God. 22However, he may eat from the food offered to God, including the holy offerings and the most holy offerings. 23Yet because of his physical defect, he may not enter the room behind the inner curtain or approach the altar, for this would defile my holy places. I am the Lord who makes them holy.”
24So Moses gave these instructions to Aaron and his sons and to all the Israelites.
Leviticus 21:17-24 (NLT)