Leviticus 15:24-26

The Voice

²⁴ If a man has sexual relations with a woman during her menstrual period and her menstrual blood gets on him, he will be impure for seven days, and any bed he lies down upon will be impure as well.

²⁵ If a woman discharges blood for several days beyond her menstrual period or outside of it, then she will treat those days as if she were having her menstrual period and will be impure. ²⁶ Treat every bed she lies down upon during her irregular discharge like the bed she lies down upon while she is in her menstrual period. Anything she sits down upon will be considered impure just as it is when she is menstruating.