Leviticus 15:24-28

If 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.

‘Now if a woman has a discharge of her blood for many days, not at the period of her menstrual impurity, or if she has a discharge beyond that period, for all the days of her impure discharge she shall continue as though in her menstrual impurity; she is unclean.

Any bed on which she lies all the days of her discharge shall be to her like her bed at menstruation; and every object on which she sits shall be unclean, like her uncleanness at that time.

Likewise, whoever touches them shall be unclean, and shall wash his clothes and bathe in water and be unclean until evening.

When she becomes clean from her discharge, she shall count off for herself seven days; and afterward she will be clean.