Genesis 20:9-12

9Then Abimelek called Abraham in and said, “What have you done to us? How have I wronged you that you have brought such great guilt upon me and my kingdom? You have done things to me that should never be done.”

10And Abimelek asked Abraham, “What was your reason for doing this?”

11Abraham replied, “I said to myself, ‘There is surely no fear of God in this place, and they will kill me because of my wife.’

12Besides, she really is my sister, the daughter of my father though not of my mother; and she became my wife.