Sahih al-Bukhari - Book 78, Hadith 49
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Narrated Abu Huraira: Allah's Messenger (ﷺ) said, "Anybody who believes in Allah and the Last Day should not harm his neighbor, and anybody who believes in Allah and the Last Day should entertain his guest generously and anybody who believes in Allah and the Last Day should talk what is good or keep quiet. (i.e. abstain from all kinds of evil and dirty talk).
How the Prophet ﷺ modelled this behaviour here
Mindful Speech
“Narrated Abu Huraira: Allah's Messenger (ﷺ) said, "Anybody who believes in Allah and the Last Day should not harm his neighbor, and anybody who...”
Exercising self control with your words by knowing when to stay quiet rather than making unnecessary, provoking, or shaming comments.