Genesis 21:29 WEB

²⁷  Abraham took sheep and oxen, and gave them to Abimelech. Those two made a covenant.

²⁸  Abraham set seven ewe lambs of the flock by themselves.

²⁹  Abimelech said to Abraham, 'What do these seven ewe lambs which you have set by themselves mean?'

³⁰  He said, 'You shall take these seven ewe lambs from my hand, that it may be a witness to me, that I have dug this well.'

³¹  Therefore he called that place Beersheba,{Beersheba can mean 'well of the oath' or 'well of seven.'} because they both swore there.