Genesis 20:10-13

10And Abimelech said to Abraham, What hast thou seen that thou hast done this?

11And Abraham said, Because I said, Surely the fear of 1God is not in this place, and they will kill me for my wife's sake.

12But she is also truly my sister, the daughter of my father, but not the daughter of my mother; and she became my wife.

13And it came to pass when 2God caused me to wander from my father's house, that I said to her, Let this be thy kindness which thou shalt shew to me: at every place whither we shall come, say of me, He is my brother.