Leviticus 21:8, 15, 23

You must treat them as holy because they offer up food to your God. You must consider them holy because I, the LORD, am holy, and I make you holy.

so that he will not dishonor his descendants among his clan, for I am the LORD who makes him holy.”

Yet 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.”