Genesis 19:35-37

Complete Jewish Bible

³⁵ They plied their father with wine that night also, and the younger one got up and slept with him, and he didn’t know when she lay down or when she got up. ³⁶ Thus both the daughters of Lot became pregnant by their father.

³⁷ The older one gave birth to a son and called him Mo’av; he is the ancestor of Mo’av to this day.