Valmiki Ramayana Kishkindha Kanda Sarga 18 Shloka 21

हरियूथप O lord of monkeys, धर्मविरुद्धस्य for one who acts against dharma, लोकवृत्तात् from the accepted practice of the world, अपेयुषः for one who swerved, दण्डात् from punishing, अन्यत्र other than this, निग्रहम् preventing, न पश्यामि हि I have not seen.

'O lord of monkeys I do not see any other way of controlling a person excepting punishing the one who has acted against dharma and swerved from the accepted code of conduct.