Lev 15:19-24

19When a woman has a discharge of blood that is her regular discharge from her body, she shall be in her impurity for seven days, and whoever touches her shall be unclean until the evening.20Everything upon which she lies during her impurity shall be unclean; everything also upon which she sits shall be unclean.21Whoever touches her bed shall wash his clothes, and bathe in water, and be unclean until the evening.22Whoever touches anything upon which she sits shall wash his clothes, and bathe in water, and be unclean until the evening;23whether it is the bed or anything upon which she sits, when he touches it he shall be unclean until the evening.24If any man lies with her, and her impurity falls on him, he shall be unclean seven days; and every bed on which he lies shall be unclean.