Matthew 18:6

But, if any one puts a snare in the way of one of these lowly ones who believe in me, it would be best for him to be sunk in the depths of the sea with a great millstone hung round his neck.

Revelation 18:21

Then a mighty angel took up a stone like a great millstone, and threw it into the sea, crying-- 'So shall Babylon, the Great City, be violently overthrown, never more to be seen.

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, if any one puts a snare in the way of one of these lowly ones who believe in me, it would be best for him to be sunk in the depths of the sea with a great millstone hung round his neck.

They

Revelation 18:21
Then a mighty angel took up a stone like a great millstone, and threw it into the sea, crying-- 'So shall Babylon, the Great City, be violently overthrown, never more to be seen.