Genesis 26:12-15

Isaac planted crops in that land and the same year reaped a hundredfold, because the LORD blessed him. The man became rich, and his wealth continued to grow until he became very wealthy. He had so many flocks and herds and servants that the Philistines envied him. So all the wells that his father’s servants had dug in the time of his father Abraham, the Philistines stopped up, filling them with earth.