Leviticus 15:19-24

¹⁹‘When a woman has a discharge, if her discharge in her body is blood, she shall continue in her menstrual impurity for seven days; and whoever touches her shall be unclean until evening. ²⁰Everything also on which she lies during her menstrual impurity shall be unclean, and everything on which she sits shall be unclean. ²¹Anyone who touches her bed shall wash his clothes and bathe in water and be unclean until evening. ²²Whoever touches any object on which she sits shall wash his clothes and bathe in water and be unclean until evening. ²³Whether it be on the bed or on the thing on which she is sitting, when he touches it, he shall be unclean until evening. ²⁴If a man actually sleeps with her so that her menstrual impurity is on him, he shall be unclean seven days, and every bed on which he lies shall be unclean.