Genesis 20:14 (KJV)

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 took sheep, and oxen, and menservants, and womenservants, and gave them unto Abraham, and restored him Sarah his wife.

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.