Genesis 26:18-21

ISV(i) 18 Disputes over Water RightsIsaac re-excavated some wells that his father had first dug during his lifetime, because the Philistines had filled them with sand after Abraham’s death. Isaac renamed those wells with the same names that his father had called them.
19 While Isaac’s servants were digging in the valley, they discovered a well with flowing water. 20 But the herdsmen who lived in Gerar quarreled with Isaac’s herdsmen. “The water is ours,” they said. As a result, Isaac named the well Esek, for they had fiercely disputed with him about it. 21 When his workers started digging another well, those herdsmen quarreled about that one, too, so Isaac named it Sitnah.