1. The Lord said to Moses, Say to the priests, Aaron’s sons: None of you are allowed to make yourselves unclean by any dead person among your community
2. except for your closest relatives: for your mother, father, son, daughter, brother;
3. also for your unmarried sister, who is close to you because she isn’t married—you may be polluted for her sake.
4. You must not make yourself unclean for in-laws, defiling yourself by doing so.