Genesis 26:17-19

17And Isaac departed from there, and pitched his tent in the valley of Gerar, and dwelt there. 18And Isaac dug again the wells of water, which they had dug in the days of Abraham his father; for the Philistines had stopped them after the death of Abraham: and he called their names after the names by which his father had called them. 19And Isaac’s servants dug in the valley, and found there a well of springing water.1