Bhagavad Gita: Chapter 2, Verse 36

अवाच्यवादांश्च बहून्वदिष्यन्ति तवाहिताः ।
निन्दन्तस्तव सामर्थ्य ततो दुःखतरं नु किम् ॥ २-३६ ॥

avācya-vādāṁś ca bahūn vadiṣyanti tavāhitāḥ
nindantas tava sāmarthyaṁ tato duḥkha-taraṁ nu kim 2.36

Your enemies will describe you in many unkind words, disparaging your ability. What could be more painful for you?