Genesis 26:33
Shibah <07656> [Shebah. i.e., an oath. therefore.]
Beer Sheba <0884> [Beer-sheba. i.e., the well of the oath.]
This may have been the same city which was called Beer-sheba a hundred years before this, in the time of Abraham; but as the well, from which it had its name originally, was closed up by the Philistines, the name of the place might have been abolished with the well; when, therefore, Isaac re-opened it, he restored the ancient name of the place.