મુવાને મર કહે નહીં.

muvānē mara kahē nahīṁ.

Literally: Do not tell the dead to die.
What it means: There is no point in threatening or punishing someone who is already completely ruined or powerless.

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.