Hebrews 11:12

Wherefore also there sprang from one, and one impotent as to these things, as many as the stars of heaven in multitude, and as the sand, which is by the sea-shore, innumerable.

Revelation 7:9-10

After these things I saw, and, behold, a great multitude, which no one could number, out of every nation, and of all tribes and peoples and tongues, standing before the throne, and before the Lamb, arrayed in white robes, and palms 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
Wherefore also there sprang from one, and one impotent as to these things, as many as the stars of heaven in multitude, and as the sand, which is by the sea-shore, innumerable.
Revelation 7:9
After these things I saw, and, behold, a great multitude, which no one could number, out of every nation, and of all tribes and peoples and tongues, standing before the throne, and before the Lamb, arrayed in white robes, and palms in their hands;