Romans 11:11-14 Summary
Natural Israel's fall enriched the world, which makes spiritual Israel's fullness exceedingly great.
I am saying then, didn't they [all] trip that they would be falling? May it not be. But by their apostacy, salvation to the nations into stimulating them alongside. And if their falling away is riches of the world, and their diminishment, riches of the nations, how especially great their fullness? And I am saying to you, the nations, indeed then as much as I am an apostle of the nations, I am glorifying my dispensation if I may somehow stimulate alongside those of my flesh, and be saving some out of them. Romans 11:11-14
This was seen by Jacob who prophesied that the seed of Israel (Ephraim) would become a fullness of gentiles (nations) in fulfillment of God's promise to Abraham that he would become the father of many nations
And his father [Jacob] refused, and said, I know, my son, I know. He [Manasseh] also shall become a people, and he also shall be great, but truly his younger brother [Ephraim] shall be greater than he, and his seed shall become a fullness of gentiles. Genesis 48:19
Which we see fulfilled here
After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands; Revelation 7:9