Leviticus 21:1–2
Holiness and the Priests
1 And the Lord said to Moses, “Speak to the priests, the sons of Aaron, and say to them, aNo one shall make himself unclean for the dead among his people, 2 except for his closest relatives, his mother, his father, his son, his daughter, his brother,
Leviticus 21:11
11 He shall not lgo in to any dead bodies nor make himself unclean, even for his father or for his mother.