Genesis 21:25-29

But Abraham complained to Abimelech because of the well of water which the servants of Abimelech had seized.

And Abimelech said, “I do not know who has done this thing; you did not tell me, nor did I hear of it until today.”

So Abraham took sheep and oxen and gave them to Abimelech, and the two of them made a covenant.

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

Then Abimelech said to Abraham, “What do these seven ewe lambs mean, which you have set by themselves?”