Bismillah
عن أبي هريرة رضي الله تعالى عنه أن رسول الله صلى الله عليه وآله وسلم قال : (( من كان يؤمن بالله واليوم الآخر فليقل خيرا أو ليصمت ، ومن كان يؤمن بالله واليوم الآخر فليكرم جاره ، ومن كان يؤمن بالله واليوم الآخر فليكرم ضيفه )) رواه البخاري ومسلم .
Narrated under the authority of Abi Horairah may Allah be Pleased with him that the Messenger salla Allah a`lyhee wa sallam said: "One who believes in Allah and the Day After shall only say good or remain silent, One who believes in Allah and the Day After shall treat his neighbour graciously, One who believes in Allah and the Day After shall treat his guest graciously" (reported by Bukhari and Muslim)
In this hadeeth, we learn how to protect our tongures and keep silent if we do not have anything good to say. We really need to focus on this virtue in all aspects of our lives. In some cases people just speak for the sake of proving presence. We as Muslims need to consider when to speak and when to remain silent.
Just to elaborate for the sake of further explanation, the good here refers to for instance, teaching good matters, enjoining good which should be conducted based on proper knowledge and maintaining kind and patient attitude, forbidding evil also conducted based on proper knowledge and maintaining kind attitude, reconciliation between people, uttering a word of truth to people in authority..etc.