Genesis 26:9-10

9Abimelech sent for Isaac and said, “So she is really your wife! How could you say, ‘She is my sister’?”

Isaac replied, “Because I thought I might die on account of her.”

10“What is this you have done to us?” asked Abimelech. “One of the people could easily have slept with your wife, and you would have brought guilt upon us.”