Hebrews 11:12

Wherefore also there were born of one, and those of one dead, [a posterity] like the stars of heaven for multitude, and like the sands on the sea-shore innumerable.

Revelation 7:9-10

After this I saw, and behold, a great multitude, which no man could number, of every nation and of all tribes and peoples and tongues, standing before the throne and before the Lamb, clothed with white robes, and having 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
Wherefore also there were born of one, and those of one dead, [a posterity] like the stars of heaven for multitude, and like the sands on the sea-shore innumerable.
Revelation 7:9
After this I saw, and behold, a great multitude, which no man could number, of every nation and of all tribes and peoples and tongues, standing before the throne and before the Lamb, clothed with white robes, and having palm branches in their hands;