I will surely bless you, and I will surely multiply your offspring as the stars of heaven and as the sand that is on the seashore. And your offspring shall possess the gate of his enemies,
17. Thy seed shall possess the gate of his enemies. He means that the offspring of Abraham should be victorious over their enemies; for in the gates were their bulwarks, and in them they administered judgment. Now, although God often suffered the enemies of the Jews tyrannically to rule over them; yet he so moderated their revenge, that this promise always prevailed in the end.
Abraham's obedience was graciously accepted; but this was not all: here we have it recompensed, abundantly recompensed, before he stirred from the place; probably while the ram he had sacrificed was yet burning God sent him this gracious message, renewed and ratified his covenant with him. All covenants were made by sacrifice, so was this by the typical sacrifices of Isaac and the ram.
Commenting on Genesis 22:15-19
And in thy seed shall all nations of the earth be blessed,.... That is, in his one and principal seed, the Messiah, that should spring from him, Gal 3:16, in whom all the elect of God, of all nations under the heavens, are blessed with all spiritual blessings, with peace, pardon, righteousness, and eternal life, with grace here and glory hereafter; See Gill on Gen...