In an article I'm writing I want to quote (with attribution) the original version of an aphorism that says that one can often find mathematical gold in the waste-baskets of physicists. Would someone provide a reference to that original version?

Note added after awarding bounty: For the time being, I'm going to assume that the quote is actually due to me! (I came up with it a few weeks ago, but it leaped into my mind with such rapidity that I suspected I wasn't inventing it so much as remembering it.) If anyone finds the quote in the next few months (before I include it in my own published work without attribution), please let me know! I'll be glad to make private arrangements to transfer 50 of my reputation points to you.