Abu Huraira reported Allah's Messenger ﷺ as saying: When a person says that people are ruined he is himself ruined. Abu Ishaq said: I do not know whether he said" ahlakahum or ahlakuhum.
The Prophet Muhammad ﷺ also taught us that if we are ever faced with criticism or hurtful comments from someone else, we should respond in a gentle manner instead of lashing out in anger or revenge. By responding calmly and kindly, we can show that person the error of their ways without causing any further harm or damage to either party involved.
In conclusion, this hadith serves as an important reminder for all Muslims to be mindful of their speech at all times and strive to use kind words when talking about others so they may reap the rewards in both this life and the hereafter.