27 And Abraham took sheep and oxen, and gave them unto Abimelech; and both of them made a covenant. 28 And Abraham set seven ewe lambs of the flock by themselves. 29 And Abimelech said unto Abraham, What mean these seven ewe lambs which thou hast set by themselves? 30 And he said, For these seven ewe lambs shalt thou take of my hand, that they may be a witness unto me, that I have digged this well. 31 Wherefore he called that place Beer-sheba; because there they sware both of them.
Abraham brought to Abimelech’s attention that his own servants had taken one of Abraham’s wells by force. Abimelech had not been aware of the offense, but it had come from those that he was responsible for.
A well was an extremely valuable commodity at the time, and one could see how a disagreement about the ownership of it could cause a rift between two newly established friends. So Abraham immediately follows up his accusation with something designed to quell any negative feelings. He gives seven lambs to Abimelech as a testament that he really was the owner of the well. This is a very interesting gesture. Essentially Abraham is giving a small compensation to Abimelech for the inconvenience of having to give back to Abraham what was rightfully his!
This shows a great maturity in Abraham. It helps to prove his sincerity, because at the end of the day he would be out seven lambs whether Abimelech returned the well or not. It also shows that he is sensitive to the embarrassment Abimelech might feel in having his servants called out as thieves, and the offering of this gift makes clear that Abraham has no ill feelings towards Abimelech himself. It is a way of saying “I wanted you to know about this…but don’t worry, we’re still friends.”