પાદ્યા વગર કાંઈ ગંધાય.

pādyā vagara kāṁī gaṁdhāya.

Literally: Does anything smell without someone passing wind?
What it means: Rumors or suspicions do not arise without some underlying truth or action.

Also said as

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.