Genesis 26:30

27 and Isaac saith unto them, `Wherefore have ye come unto me, and ye have hated me, and ye send me away from you?`

28 And they say, `We have certainly seen that Jehovah hath been with thee, and we say, `Let there be, we pray thee, an oath between us, between us and thee, and let us make a covenant with thee;

29 do not evil with us, as we have not touched thee, and as we have only done good with thee, and send thee away in peace; thou [art] now blessed of Jehovah.`

30 And he maketh for them a banquet, and they eat and drink,

31 and rise early in the morning, and swear one to another, and Isaac sendeth them away, and they go from him in peace.

32 And it cometh to pass during that day that Isaac`s servants come and declare to him concerning the circumstances of the well which they have digged, and say to him, `We have found water;`

33 and he calleth it Shebah, [oath,] therefore the name of the city [is] Beer-Sheba, [well of the oath,] unto this day.