Leviticus 15:4-8

4If the man sits on a bed, it becomes unclean. If the man sits on anything, it becomes unclean.

5A person who touches the bed must wash his clothes and his body. He will be unclean until evening.

6If anyone sits on anything that he has sat on, they will also become unclean. So they must wash their clothes and their body. They will also be unclean until evening.

7A person who touches the unclean man must wash his clothes. He must also wash his body. He will be unclean until evening.

8A man who is unclean might spit on another person. Then the other person must wash his clothes. He must also wash his body. He will be unclean until evening.