Whether an object is on the bed or on something she sat upon, when the person touches it, that person shall be unclean until evening.
You become unclean by the following—anyone who touches their carcasses shall be unclean until evening,
Whoever touches any article on which she was sitting shall wash his garments, bathe in water, and be unclean until evening.
If a man lies with her, he contracts her menstrual uncleanness and shall be unclean for seven days; every bed on which he then lies also becomes unclean.
Moreover, anything that the unclean person touches becomes unclean itself, and the one who touches such a person becomes unclean until evening.