The Exchange: Gone Fishing?

Someone familiar with the lore of that sport may be able to help another reader of "The Ex change" who wants to know the source of the following maxim: "Allah does not subtract from the allotted span of a man's life the time he spends fishing." Joan Mosey, reference librarian at the Florida Institute of Technology in Mel bourne, Florida wrote to ask about the quota tion on behalf of Eileen Hall who is head of technical services at the same institution. Can anyone out there land this one?