“As for Me, this is My covenant with you: You will be the father of many nations.
4. As for me, behold, my covenant is with thee “Ego, ecce pactum meum tecum.” “I, behold, my covenant is with thee.” They who translate the passage, ‘Behold, I make a covenant with thee,’ or, ‘Behold, I and my covenant with thee;’ do not seem to me faithfully to represent the meaning of Moses.
The promise here is introduced with solemnity: "As for me," says the great God, "behold, behold and admire it, behold and be assured of it, my covenant is with thee;" as before (Gen 17:2), I will make my covenant. Note, The covenant of grace is a covenant of God's own making; this he glories in (as for me), and so may we. Now here, I.
Commenting on Genesis 17:4-6
As for me, behold, my covenant is with thee,.... Who was gracious to make it, faithful to keep it, and immutable in it, though Abram was but a man, and sinful: and thou shalt be a father of many nations: as he was of many Arabian nations, and of the Turks in the line of Ishmael; and of the Midianites, and others, in the line...