Genesis 26:29-33

that you will do us no harm, just as we have not touched you and have done to you nothing but good, and have sent you away in peace. You are now the blessed of the Lord.”

Then he made them a feast, and they ate and drank.

In the morning they got up early and exchanged oaths; then Isaac sent them away, and they left him in peace.

Now it came about on the same day, that Isaac’s servants came in and told him about the well which they had dug, and said to him, “We have found water.”

So he called it Shibah; therefore the name of the city is Beersheba to this day.