મિત્ર અવગુણ મિત્રકા, પરસે ભાખત નાહીં;

mitra avaguṇa mitrakā, parasē bhākhata nāhīṁ;

Literally: A friend does not speak of a friend's faults to others.
What it means: True friends protect each other's reputations by keeping their shortcomings private.

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.