Genesis 26:1, 12-13

And there was a famine in the land, beside the first famine that was in the days of Abraham. And Isaac went unto Abimelech king of the Philistines unto Gerar.

Then Isaac sowed in that land, and received in the same year an hundredfold: and the LORD blessed him. And the man waxed great, and went forward, and grew until he became very great