• Leave the Gun, Take the Cannoli by Mark Seal

I found on Page 304 - Luca Brasi murder
“It means Luca Brasi sleeps with the fishes” Richard Castellano as Clemenza, says when the late enforcer's bulletproof vest is delivered to Sonny Corleone

I seem to remember there were debates as to who - Clemenza or Tessio – said this line According to this book it was Clemenza