Genesis 26:7-11 - Isaac's Deception
7 His wife Rebekah was very beautiful. He was afraid that someone might kill him to get her. So he told everyone that Rebekah was his sister. 8 After Isaac had been there a long time, King Abimelech looked out a window and saw Isaac intimately laughing and caressing Rebekah.
9 Abimelech called him in and said: Rebekah must be your wife! Why did you say she is your sister? I thought someone would kill me, Isaac answered.
10 Do you know what you have done? Abimelech shouted. If someone had slept with her, you would have made our whole nation guilty! 11 So Abimelech charged all the people, saying: He who touches this man or his wife will certainly be put to death.