Easton's Bible Dictionary Quarrel, a well which Isaac's herdsmen dug in the valley of Gerar, and so called because the herdsmen of Gerar quarrelled with them for its possession (Genesis 26:20). Int. Standard Bible Encyclopedia ESEK e'-sek (eseq; Septuagint Adikia): The name given by Isaac to a well dug by his servants, for the use of which the herdsmen of Gerar strove with them-"contention" (Genesis 26:20). It lay in the neighborhood of Rehoboth and Gerar: but the site is not identified.

Multi-Version Concordance Esek (1 Occurrence) Genesis 26:20 The herdsmen of Gerar argued with Isaac's herdsmen, saying, "The water is ours." He called the name of the well Esek, because they contended with him. (WEB KJV JPS ASV BBE DBY WBS NAS RSV NIV)