કુપ છાંય છમ આપની, રાખત આપહી માંહી.

kupa chāṁya chama āpanī, rākhata āpahī māṁhī.

Literally: Like the shadow of a well, they keep it within themselves.
What it means: Loyal companions keep their mutual secrets and flaws strictly confidential, never letting them leak to the outside world.

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.