Sahih al-Bukhari — Good Manners and Form (Al-Adab) — Hadith No: 6046
Translation
Narrated Anas:Allah's Messenger (ﷺ) was neither a Fahish (one who had a bad tongue) nor a Sabbaba (one who abuses others) and he used to say while admonishing somebody, "What is wrong with him? May dust be on his forehead