Genesis 26:9-10

9Then Abimelech called Isaac and said, “Behold, certainly she is your wife! How then did you say, ‘She is my sister’?” And Isaac said to him, “Because I said, ‘I might die on account of her.’”

101Abimelech said, “What is this you have done to us? One of the people might easily have lain with your wife, and you would have brought guilt upon us.”