Bible Verses About Defilement: Specially required to avoid

The LORD said to Moses, “Speak to the priests, the sons of Aaron, and say to them, ‘A priest shall not defile himself for the dead among his people;

except for his relatives that are near to him: for his mother, for his father, for his son, for his daughter, for his brother,

and for his virgin sister who is near to him, who has had no husband; for her he may defile himself.

He shall not defile himself, being a chief man among his people, to profane himself.

“‘They shall not shave their heads, neither shall they shave off the corners of their beards, nor make any cuttings in their flesh.

They shall be holy to their God, and not profane the name of their God; for they offer the offerings of the LORD made by fire, the bread of their God; therefore they shall be holy.