Genesis 20:14

And 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.

And it came to pass, when God caused me to wander from my father's house, that I said unto her, This [is] thy kindness which thou shalt shew unto me; at every place whither we shall come, say of me, He [is] my brother.

And Abimelech said, Behold, my land [is] before thee: dwell where it pleaseth thee.

And unto Sarah he said, Behold, I have given thy brother a thousand [pieces] of silver: behold, he [is] to thee a covering of the eyes, unto all that [are] with thee, and with all [other]: thus she was reproved.