Genesis 26:1-6

Now there was a famine in the land, besides the previous famine that had occurred in the days of Abraham. So Isaac went to Gerar, to Abimelech king of the Philistines. The LORD appeared to him and said, “Do not go down to Egypt; stay in the land of which I shall tell you. Sojourn in this land and I will be with you and bless you, for to you and to your descendants I will give all these lands, and I will establish the oath which I swore to your father Abraham. 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 kept My charge, My commandments, My statutes and My laws.” So Isaac lived in Gerar.