Hebrews 11:12

And thus there sprang from one man, and him practically dead, a nation like the stars of the sky in number, and like the sands on the sea shore which cannot be counted.

Revelation 7:9-10

After this I looked, and a vast host appeared which it was impossible for anyone to count, gathered out of every nation and from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in long white robes, and carrying palm-branches in their hands.

Treasury of Scripture Knowledge

Summary

As the host of heaven cannot be numbered, neither the sand of the sea measured: so will I multiply the seed of David my servant, and the Levites that minister unto me.

Bible References

The host

Hebrews 11:12
And thus there sprang from one man, and him practically dead, a nation like the stars of the sky in number, and like the sands on the sea shore which cannot be counted.
Revelation 7:9
After this I looked, and a vast host appeared which it was impossible for anyone to count, gathered out of every nation and from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in long white robes, and carrying palm-branches in their hands.