Matthew 18:6

And whosoever shall cause one of these little ones, who believe in me, to stumble, it were better for him that a millstone was hung at his neck, and that he was sunk in the depth of the sea.

Revelation 18:21

And a mighty angel took up a stone as a great milestone, and cast it into the sea, saying, So with rapidity shall the great city Babylon be hurled into the deep, and never shall be found more.

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
And whosoever shall cause one of these little ones, who believe in me, to stumble, it were better for him that a millstone was hung at his neck, and that he was sunk in the depth of the sea.

They

Revelation 18:21
And a mighty angel took up a stone as a great milestone, and cast it into the sea, saying, So with rapidity shall the great city Babylon be hurled into the deep, and never shall be found more.