Genesis 20:9-12

9Then Abimelech called Abraham, and said to him, What hast thou done to us? and how have I offended thee, that thou hast brought on me and on my kingdom a great sin? thou hast done deeds to me that ought not to be done. 10And Abimelech said to Abraham, What sawest thou, that thou hast done this thing? 11And Abraham said, Because I thought, Surely the fear of God is not in this place; and they will slay me for my wife’s sake. 12And yet indeed she is my sister; she is the daughter of my father, but not the daughter of my mother; and she became my wife.