Genesis 26:19

17And Isaac departed thence, and pitched his tent in the valley of Gerar, and dwelt there.

18And Isaac digged again the wells of water, which they had digged 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 digged in the valley, and found there a well of springing water.

20And the herdmen of Gerar did strive with Isaac’s herdmen, saying, The water is ours: and he called the name of the well Esek; because they strove with him.

21And they digged another well, and strove for that also: and he called the name of it Sitnah.