Matthew 18:6

But that person who causes one of these little ones [i.e., humble followers of the Lord] who believes in me to be led astray [from God], he would have been better off to have had a huge millstone tied around his neck and dumped into a deep ocean [Note: This "millstone" was a heavy circular stone rolled over grain to crush it and was moved by an animal walking in a circle].

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

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

Depths

Bible References

Depths

Matthew 18:6
But that person who causes one of these little ones [i.e., humble followers of the Lord] who believes in me to be led astray [from God], he would have been better off to have had a huge millstone tied around his neck and dumped into a deep ocean [Note: This "millstone" was a heavy circular stone rolled over grain to crush it and was moved by an animal walking in a circle].

They

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.