Those teachings are so people can know unclean [145] animals from clean [146] animals. So people will know which animals they can eat and which animals they must not eat.
“Tell the people of Israel: If a woman gives birth to a baby boy, then that woman will be unclean [147] for seven days. This will be like her being unclean during her monthly time of bleeding.
There are many things that come from a person that make a person unclean. A person might touch any of these things from another person, but not know about it. When that person learns that he has touched something unclean, he will be guilty.
“A person might touch something that is unclean. [79] That thing may have been made unclean by people, by an unclean animal, or by any unclean hated thing. {That person will become unclean, and} if he eats any of the meat from the fellowship offerings that belong to the Lord, then that person must be separated from his people.”
The time came for Mary and Joseph to do the things the law of Moses taught about being made pure. {\cf2\super [31]} Joseph and Mary brought Jesus to Jerusalem so they could present him to the Lord (God).