Genesis 26:31

29That thou wilt do us no hurt, as we have not touched thee, and as we have done unto thee nothing but good, and have sent thee away in peace: thou art now the blessed of the LORD.

30And he made them a feast, and they did eat and drink.

31And they rose up betimes in the morning, and sware one to another: and Isaac sent them away, and they departed from him in peace.

32And it came to pass the same day, that Isaac’s servants came, and told him concerning the well which they had digged, and said unto him, We have found water.

33And he called it Shebah: therefore the name of the city is Beersheba unto this day.