Leviticus 15:24

15:24 and if a man actually has sexual intercourse with her so that her menstrual impurity touches him, then he will be unclean seven days and any bed he lies on will be unclean.

Leviticus 15:30

15:30 and the priest is to make one a sin offering and the other a burnt offering. So the priest is to make atonement for her before the Lord from her discharge of impurity.