Leviticus 15:18-20

Amplified Bible

¹⁸ If a man lies with a woman so that there is a seminal emission, they shall both bathe in water and be unclean until evening.

¹⁹ ‘When a woman has a discharge, if her bodily discharge is blood, she shall continue in her menstrual impurity for seven days; and whoever touches her shall be unclean until evening. ²⁰ Everything on which she lies during her menstrual impurity shall be unclean; and everything on which she sits shall be unclean.