Genesis 26:17-20

17And Isaac departed from there and camped in the valley of Gerar, and 1settled there.

18Then Isaac dug again the wells of water which 2had been dug in the days of his father Abraham, for the Philistines had stopped them up after the death of Abraham; and he 3gave them the same names which his father had 4given them. 19But when Isaac’s servants dug in the valley and found there a well of 5flowing water, 20the herdsmen of Gerar 6quarreled with the herdsmen of Isaac, saying, “The water is ours!” So he named the well 7Esek, because they contended with him.