Leviticus 15:25

15:25 “‘When a woman’s discharge of blood flows many days not at the time of her menstruation, or if it flows beyond the time of her menstruation, all the days of her discharge of impurity will be like the days of her menstruation – she is unclean.

Leviticus 18:17

18:17 You must not have sexual intercourse with both a woman and her daughter; you must not take as wife either her son’s daughter or her daughter’s daughter to have intercourse with them. They are closely related to her – it is lewdness.