Control on the Tongue
The Prophet of Islam said that it is enough for a man to be a liar to repeat everything he hears. (Musnad al-Bazzar, Hadith No. 8201) This tradition explains an important principle of etiquette, which is that man should never speak without thinking.
In social life, we often hear a lot of negative things about others. We know from experience that when something heard is repeated, the narrative can be distorted so much that often the original version is completely lost. Therefore, man should never repeat things based on just listening. However, there is nothing wrong with repeating good news, but if it is bad news, it should not be repeated until the whole thing has been properly investigated.