Genesis 21:29-31

Young's Literal Translation

²⁹ And Abimelech saith unto Abraham, `What [are] they -- these seven lambs which thou hast set by themselves?'

³⁰ And he saith, `For -- the seven lambs thou dost accept from my hand, so that it becometh a witness for me that I have digged this well;'

³¹ therefore hath he called that place `Beer-Sheba,' for there have both of them sworn.