Genesis 26:1, 12-13

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 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