Revelation 18:21

Then a single angel of great strength took a stone which resembled a huge millstone, and hurled it into the sea, saying, "So shall Babylon, that great city, be violently hurled down and never again be found.

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 single angel of great strength took a stone which resembled a huge millstone, and hurled it into the sea, saying, "So shall Babylon, that great city, be violently hurled down and never again be found.