Matthew 18:6

But whoever shall occasion the fall of one of these little ones who believe in me, it would be better for him to have a millstone hung round his neck and to be drowned in the depths of the sea.

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

The depths have covered them: they sank into the bottom as a stone.

Depths

Bible References

Depths

Matthew 18:6
But whoever shall occasion the fall of one of these little ones who believe in me, it would be better for him to have a millstone hung round his neck and to be drowned in the depths of the sea.

They

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.