જીવતી માંખ ન ગળાય.

jīvatī māṁkha na gaḷāya.

Literally: A live fly cannot be swallowed.
What it means: One cannot knowingly accept an obvious falsehood or stomach a repulsive injustice.

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.