Genesis 26:9-11

9 So Abimelech summoned Isaac and said, “She is really your wife! Why did you say, ‘She is my sister’?”
Isaac answered him, “Because I thought I might lose my life on account of her.”

10 Then Abimelech said, “What is this you have done to us? One of the men might well have slept with your wife, and you would have brought guilt upon us.”

11 So Abimelech gave orders to all the people: “Anyone who molests this man or his wife shall surely be put to death.”