Revelation 18:21

Then a mighty angel picked up a rock the size of a huge millstone and threw it into the ocean, saying, "This is how the great city of Babylon will be violently thrown down and will never be found again.

Treasury of Scripture Knowledge

Summary

I will make thee a terror, and thou shalt be no more: though thou be sought for, yet shalt thou never be found again, saith the Lord GOD.

Bible References

Though

Revelation 18:21
Then a mighty angel picked up a rock the size of a huge millstone and threw it into the ocean, saying, "This is how the great city of Babylon will be violently thrown down and will never be found again.