Dr. King is reported to have said, "Wars are poor chisels for carving out peaceful tomorrows." September Eleventh Families for Peaceful Tomorrows, for example, takes their name from this quote, and Coretta Scott King used a similar phrasing in her speech, referencing her husband. In a few places, the quote is reported as ending simply "...carving out tomorrows."

Yet I cannot find anywhere a direct reference to where this was said. The quotation books I have don't include that among his quotes, and all the references I can find online are unsourced. I know he often said similar things in different speeches, so I know different versions of the same idea might exist. My question is: Did Dr. King ever say this or something like it? And if so, when and where?

Thanks!