જીવતી ઘોડી નહીં ઓળવાય.

jīvatī ghōḍī nahīṁ ōḷavāya.

Literally: A living mare cannot be stepped over.
What it means: An active, capable person cannot be easily bypassed or taken advantage of while alive.

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.