Genesis 20:9-12

Then Abimelech called for Abraham. “What have you done to us?” he demanded. “What crime have I committed that deserves treatment like this, making me and my kingdom guilty of this great sin? No one should ever do what you have done! Whatever possessed you to do such a thing?” Abraham replied, “I thought, ‘This is a godless place. They will want my wife and will kill me to get her.’ And she really is my sister, for we both have the same father, but different mothers. And I married her.