Genesis 15:5

And He brought him forth abroad and said, Look now toward heaven and tell the stars, if thou be able to number them; and He said unto him, So shall thy seed be. God's patience has a wonderful sustaining and strengthening power. In order to impress upon His servant the exact meaning of His promise, the Lord brought him outside and had him look closely at the starry heavens, whether he felt able to count the stars. So great, in brief, would be the number of his descendants. This promise, in the last analysis, is Messianic. Through the one Seed, Christ, all nations on earth were to be blessed, and all men of all nations that have accepted the only salvation, that in Jesus Christ, are the descendants of Abraham in truth; they are the people of God, the spiritual Israel, Romans 4:18.