Disturbed “The Sound Of Silence”
This cover song came on 93.3 WMMR after the gym ( 60 minute Spin ride tribute to Prince) when arriving home. My son and I were parked but grabbed our cells to see who was singing. We stayed silent in the car until the music was over. Did it pull my heart strings? Just when you believe new music is dead. Brilliant. Bravo.
This morning I played the song again for my twenty-eight year old son. ” Mom, I remember this song from the 10th Anniversary of 9/11.”
The first tract by Disturbed was performed on Conan, March 28, 2016.
The 2nd track below was performed on 9/11 Ground Zero, by Paul Simon, Sep 11, 2011.
Q&A : DISTURBED Performs ‘The Sound Of Silence’ On ‘Conan’
And the sign said,
“The words of the prophets
Are written on the subway walls
And tenement halls.”
And whispered in the sound of silence
Sidewalks Chalk 
A youtube link to a black and white clip of S & G performing the song sometime in the sixties.
The above video link has a short explanation of the song as a whole at the beginning.
Paul Simon wrote the lyrics in 1964, it has been said that the lyrics where written in February 1964 in reaction to the killing of JFK, although like most brilliant songs the meaning of it is different for different people.
The final verse of the song has the following lines, including the quote in the question.
‘And the people bowed and prayed
To the neon god they made
And the sign flashed out its warning
In the words that it was forming
And the sign said, “The words of the prophets are written on the subway walls
And tenement halls”
And whispered in the sounds of silence’
Personally, it seems to me not to be religious, but a social commentary on the time, and probably more relevant today than ever, that we as people seem more preoccupied how a message is delivered than what the message says, and that we would do well to listen to the ordinary people, their fears, their hatreds, than to so called experts, the message that ordinary people send out is not articulated, but simple delivered as ‘words of the prophets written on the subway walls’, indicating the unhappiness and displeasure of ordinary people.
https://answers.yahoo.com/question/index?qid=20120319020338AAbGkkH
Thank you Bob, it was a message from God this song was in your 90 min playlist for Spin this Am. ❤