Leviticus 15:18-20

Complete Jewish Bible

¹⁸ If a man goes to bed with a woman and has sexual relations, both are to bathe themselves in water; they will be unclean until evening.

¹⁹ “‘If a woman has a discharge, and the discharge from her body is blood, she will be in her state of niddah for seven days. Whoever touches her will be unclean until evening. ²⁰ Everything she lies on or sits on in her state of niddah will be unclean.