Leviticus 15:4-7, 19-23

“Every bed on which he lies is ritually unclean, everything on which he sits is unclean. If someone touches his bed or sits on anything he’s sat on, or touches the man with the discharge, he has to wash his clothes and bathe in water; he remains unclean until evening.

“When a woman has a discharge of blood, the impurity of her menstrual period lasts seven days. Anyone who touches her is unclean until evening. Everything on which she lies or sits during her period is unclean. Anyone who touches her bed or anything on which she sits must wash his clothes and bathe in water; he remains unclean until evening.