Genesis 26:6-26:12

So Isaac stayed in Gerar. When the men of the place asked him about his wife, he said, "She is my sister," for he was afraid to say "my wife," thinking, "The men of the place might kill me on account of Rebekah, for she is beautiful." When some time had passed, Abimelech king of the Philistines, looking out of the window, saw Isaac fondling his wife Rebekah. Abimelech sent for Isaac and said, "So she is your wife! Why then did you say: 'She is my sister?"' Isaac said to him, "Because I thought I might lose my life on account of her." Abimelech said, "What have you done to us! One of the people might have lain with your wife, and you would have brought guilt upon us." Abimelech then charged all the people, saying, "Anyone who molests this man or his wife shall be put to death." Isaac sowed in that land and reaped a hundredfold the same year. The Lord blessed him.