Genesis 26:33
So he named it Shibah; that is why the name of the city has been Beer Sheba to this day.
Genesis 21:31
That is why he named that place Beer Sheba, because the two of them swore an oath there.
Genesis 26:28
They replied, "We could plainly see that the Lord is with you. So we decided there should be a pact between us -- between us and you. Allow us to make a treaty with you
Treasury of Scripture Knowledge
Summary
And he called it Shebah: therefore the name of the city is Beersheba unto this day.
Therefore
Bible References
Therefore
Genesis 21:31
That is why he named that place Beer Sheba, because the two of them swore an oath there.