Srimad Bhagavatam Canto 11, Chapter 23, Text 03

SB 11.23.3

na tatha tapyate viddhah
 puman banais tu marma-gaih
yatha tudanti marma-stha
 hy asatam parusesavah
 
Translation: 
 
Sharp arrows which pierce one’s chest and reach the heart do not cause as much suffering as the arrows of harsh, insulting words that become lodged within the heart when spoken by uncivilized men.
Srimad Bhagavatam Canto 11, Chapter 23, Text 02
Srimad Bhagavatam Canto 11, Chapter 23, Text 04