Shebah: i.e. an oath
therefore: Genesis 21:31
Beersheba: i.e. the well of the oath, Genesis 26:28; 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.