પેટમાં તે પેટીમાં, ને હેઠ બહાર તે ફાટ બહાર.

pēṭamāṁ tē pēṭīmāṁ, nē hēṭha bahāra tē phāṭa bahāra.

Literally: What is in the stomach is in the box, and what is outside is outside the crack.
What it means: Secrets are hard to keep; walls have ears.

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.