Leviticus 15:19-23

19“When a woman has a discharge, and it consists of blood from her body, she will be unclean because of her menstruation for seven days. Everyone who touches her will be unclean until evening.

20Anything she lies on during her menstruation will become unclean, and anything she sits on will become unclean.

21Everyone who touches her bed is to wash his clothes and bathe with water, and he will remain unclean until evening.

22Everyone who touches any furniture she was sitting on is to wash his clothes and bathe with water, and he will remain unclean until evening.

23If discharge is on the bed or the furniture she was sitting on, when he touches it he will be unclean until evening.