પીંજણ નકામી શી પીંજવી?

pīṁjaṇa nakāmī śī pīṁjavī?

Literally: Why card a useless carding-bow?
What it means: There is no point in wasting time and effort on a useless task or a hopeless argument.

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.