Genesis 26:1-5, 12-17

And there was a famine in the land, besides the first famine that was in the days of Abraham. And Isaac went unto Abimelech king of the Philistines, unto Gerar. And Jehovah appeared unto him, and said, Go not down into Egypt; dwell in the land which I shall tell thee of: sojourn in this land, and I will be with thee, and will bless thee; for unto thee, and unto thy seed, I will give all these lands, and I will establish the oath which I sware unto Abraham thy father; and I will multiply thy seed as the stars of heaven, and will give unto thy seed all these lands; and in thy seed shall all the nations of the earth be blessed; because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.

And Isaac sowed in that land, and found in the same year a hundredfold: and Jehovah blessed him. And the man waxed great, and grew more and more until he became very great: and he had possessions of flocks, and possessions of herds, and a great household: and the Philistines envied him. Now all the wells which his father’s servants had digged in the days of Abraham his father, the Philistines had stopped, and filled with earth. And Abimelech said unto Isaac, Go from us; for thou art much mightier than we. And Isaac departed thence, and encamped in the valley of Gerar, and dwelt there.