Genesis 20:11-13

Abraham said, “I just assumed that there was no fear of God in this place and that they’d kill me to get my wife. Besides, the truth is that she is my half sister; she’s my father’s daughter but not my mother’s. When God sent me out as a wanderer from my father’s home, I told her, ‘Do me a favor; wherever we go, tell people that I’m your brother.’”