28 They said, "We see plainly that the LORD has been with you; so we said, 'Let there now be an oath between us, even between you and us, and let us make a covenant with you,
29 that you will do us no harm, just as we have not touched you and have done to you nothing but good and have sent you away in peace. You are now the blessed of the LORD.'"
Just a simple observation for today: The covenant that God made with Abraham promised him that nations would bless him. This is the first reward of the promise in Abraham’s son Isaac. Abimelech and the Philistines had a tumultuous relationship with both Abraham and Isaac. Both patriarchs had deceived them similarly. Both had managed to become quite wealthy in Canaan’s territory. But it is Abimelech who comes to Isaac now making a treaty of peace. And the basis of him doing so is that the pagan king clearly sees that Isaac has a unique situation with God.
God keeps His promises. He made a vast, national, global, and epic covenant with Abraham. He is keeping it to this day. And the rest of Genesis will show how this blessing keeps coming to each succeeding generation.