Thanks for playing though.
Martin Luther made the comment on his commentary of St. John.
Can’t find the original transcript of it; of course not. He said it and and all you have to do is google it. If you want to buy this book it’s contained right there, but the book would not contain a recording of Martin Luther so it would not meet your strict requirements.
http://www.amazon.com/Crossing-Tiber-Evangelical-Protestants-Historical/dp/0898705770