Bible Verses About Covenants: Presents given as tokens

Then Abraham took sheep and oxen, and gave them to Abimelech: and both of them made a league.

And Abraham set apart seven ewelambs of the flock.

And Abimelech said to him: What mean these seven ewelambs which thou hast set apart?

But he said: Thou shalt take seven ewelambs at my hand: that they may be a testimony for me, that I dug this well.