સુધરી બીગડે બીગડી, બીગડી ફીર સુધરે ન; દૂધ ફાટે કાંજી પડે, સો ફીર દૂધ બને ન.

sudharī bīgaḍē bīgaḍī, bīgaḍī phīra sudharē na; dūdha phāṭē kāṁjī paḍē, sō phīra dūdha banē na.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · awaiting its meaning

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.