Genesis 20:10

7 Now therefore restore to the man [his] wife, for he [is] a prophet, and he shall pray for thee, and thou shalt live: and if thou shalt not restore [her], know thou that thou shalt surely die, thou and all that [are] thine.

8 Therefore Abimelech rose early in the morning, and called all his servants, and told all these things in their ears: and the men were greatly afraid.

9 Then Abimelech called Abraham, and said to him, What has thou done to us? and in what 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.

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

11 And 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.

12 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.

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