6 So Isaac stayed put in Gerar. 7 The men of the place questioned him about his wife. He said, "She's my sister." He was afraid to say "She's my wife." He was thinking, "These men might kill me to get Rebekah, she's so beautiful." 8 One day, after they had been there quite a long time, Abimelech, king of the Philistines, looked out his window and saw Isaac fondling his wife Rebekah. 9 Abimelech sent for Isaac and said, "So, she's your wife. Why did you tell us 'She's my sister'?" Isaac said, "Because I thought I might get killed by someone who wanted her." 10 Abimelech said, "But think of what you might have done to us! Given a little more time, one of the men might have slept with your wife; you would have been responsible for bringing guilt down on us." 11 Then Abimelech gave orders to his people: "Anyone who so much as lays a hand on this man or his wife dies."

Matthew Henry's Commentary on Genesis 26:6-11

Commentary on Genesis 26:6-11

(Read Genesis 26:6-11)

There is nothing in Isaac's denial of his wife to be imitated, nor even excused. The temptation of Isaac is the same as that which overcame his father, and that in two instances. This rendered his conduct the greater sin. The falls of those who are gone before us are so many rocks on which others have split; and the recording of them is like placing buoys to save future mariners. This Abimelech was not the same that lived in Abraham's days, but both acted rightly. The sins of professors shame them before those that are not themselves religious.