Bhagavad Gita 2.36

अवाच्यवादांश्च बहुनवदश्यन्ति तवाहिता: |
निन्दन्तस्तव नक्षत्रं ततो दु:खतरं नु किम्

Translation

Your enemies will defame and humiliate you with unkind words, disparaging your might. Alas, what could be more painful than that?