6 And Isaac dwelt in Gerar. 7 And the men of the place asked him of his wife. And he said, She is my sister. For he feared to say, My wife. Lest, [said he], the men of the place should kill me for Rebekah. Because she was fair to look upon. 8 And it came to pass, when he had been there a long time, that Abimelech king of the Philistines looked out at a window, and saw, and, behold, Isaac was sporting with Rebekah his wife. 9 And Abimelech called Isaac, and said, Behold, of a surety she is thy wife. And how saidst thou, She is my sister? And Isaac said unto him, Because I said, Lest I die because of her. 10 And Abimelech said, What is this thou hast done unto us? One of the people might easily have lain with thy wife, and thou wouldest have brought guiltiness upon us. 11 And Abimelech charged all the people, saying, He that toucheth this man or his wife shall surely be put to death.

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.