Genesis 26:16-21

Then Abimelech said to Isaac, “Go away from here, because you are far too powerful for us.” So Isaac left that region and camped in the Valley of Gerar, and settled there. Now 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. But when Isaac’s servants dug in the valley and found there a well of flowing [spring] water, the herdsmen of Gerar quarreled with Isaac’s herdsmen, saying, “The water is ours!” So Isaac named the well Esek (quarreling), because they quarreled with him. Then his servants dug another well, and they quarreled over that also, so Isaac named it Sitnah (enmity).