Romans 4:16-18

Therefore it is by faith, that it might be of grace; in order that the promise might be secured to all the seed; not only to that which is of the law, but to that which is of the faith of Abraham; who is the father of us all,

Hebrews 11:12

Wherefore even from one person, and he become dead in respect to these matters, there sprang a race, as the stars of heaven for multitude, and as the sand, which is on the shore of the sea, innumerable.

Revelation 7:9

After these things I looked, and beheld a great multitude, which no man could number, out of every nation, and tribe, and people, and tongue, standing before the throne, and before the Lamb, clothed in white robes, and palm branches in their hands

Treasury of Scripture Knowledge

Summary

And I will make thy seed as the dust of the earth: so that if a man can number the dust of the earth, then shall thy seed also be numbered.

Bible References

General references

Romans 4:16
Therefore it is by faith, that it might be of grace; in order that the promise might be secured to all the seed; not only to that which is of the law, but to that which is of the faith of Abraham; who is the father of us all,
Hebrews 11:12
Wherefore even from one person, and he become dead in respect to these matters, there sprang a race, as the stars of heaven for multitude, and as the sand, which is on the shore of the sea, innumerable.
Revelation 7:9
After these things I looked, and beheld a great multitude, which no man could number, out of every nation, and tribe, and people, and tongue, standing before the throne, and before the Lamb, clothed in white robes, and palm branches in their hands