Genesis 21:28-30

Young's Literal Translation

²⁸ and Abraham setteth seven Lambs of the flock by themselves.

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;'