*Minor differences ignored. Grouped by changes, with first version listed as example.
And Abraham set seven ewe-lambs of the flock by themselves. Moses recites another chief point of the covenant; namely, that Abraham made express provision for himself respecting the well, that he should have free use of its water. And he placed in the midst seven lambs, that the king being presented with the honorary gift, might approve and ratify the digging of the well. For the inhabitants might provoke a controversy, on the ground that it was not lawful for a private man, and a stranger, to dig a well; but now, when the public authority of the king intervened, Abraham's peace was consulted, that no one might disturb him. Many understand lambs here to mean pieces of money coined in the form of lambs, but since mention has previously been made of sheep and oxen, and Moses now immediately subjoins that seven lambs are placed apart, it is absurd, in this connection, to speak of money.
Seven ewe lambs - These were either given as a present, or they were intended as the price of the well; and being accepted by Abimelech, they served as a witness that he had acknowledged Abraham's right to the well in question.
And Abraham set seven ewe lambs of the flock by themselves. Separate from the sheep and oxen he gave to Abimelech, and from those that were used in making the covenant.
*More commentary available at chapter level.