ધર્મી ધર્મ કરે, પાપી પેટ કુટે.

dharmī dharma karē, pāpī pēṭa kuṭē.

Literally: The righteous perform righteousness; the sinner beats his stomach.
What it means: Good people spend their time doing virtuous deeds, while the wicked spend theirs grieving over their unsatisfied desires.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · 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.