Genesis 26:15-18

15Now all the wells which his father’s servants had dug in the days of Abraham his father, the Philistines stopped up by filling them with dirt.

16Then Abimelech said to Isaac, “Go away from here, because you are far too powerful for us.”

17So Isaac left that region and camped in the Valley of Gerar, and settled there.

18Now Isaac again dug [and reopened] the wells of water which had been dug in the days of Abraham his father, because the Philistines had filled them up [with dirt] after the death of Abraham; and he gave the wells the same names that his father had given them.