Genesis 26:4-8

I will multiply your descendants as the stars of heaven, and will give your descendants all these lands; and by your descendants all the nations of the earth shall be blessed,

because Abraham obeyed Me and fulfilled his duty to Me, and kept My commandments, My statutes, and My laws.”

So Isaac lived in Gerar.

When the men of the place asked 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, since she is beautiful.”

Now it came about, when he had been there a long time, that Abimelech king of the Philistines looked down through a window, and saw them, and behold, Isaac was caressing his wife Rebekah.