Genesis 26:7-11 - Isaac's Deception
7 And when he was questioned by the men of the place about his wife, he said, She is my sister; fearing to say, She is my wife; for, he said, the men of the place may put me to death on account of Rebekah; because she is very beautiful. 8 And when he had been there for some time, Abimelech, king of the Philistines, looking through a window, saw Isaac playing with Rebekah his wife.
9 And he said to Isaac, It is clear that she is your wife: why then did you say, She is my sister? And Isaac said, For fear that I might be put to death because of her.
10 Then Abimelech said, What have you done to us? one of the people might well have had connection with your wife, and the sin would have been ours. 11 And Abimelech gave orders to his people that anyone touching Isaac or his wife was to be put to death.