Leviticus 15:23-25

New International Version

²³ Whether it is the bed or anything she was sitting on, when anyone touches it, they will be unclean till evening.

²⁴ “‘If a man has sexual relations with her and her monthly flow^(A) touches him, he will be unclean for seven days; any bed he lies on will be unclean.

²⁵ “‘When a woman has a discharge of blood for many days at a time other than her monthly period^(B) or has a discharge that continues beyond her period, she will be unclean as long as she has the discharge, just as in the days of her period.