Al-Adab Al-Mufrad, Hadith 430 ⓘ
Anas said, "The Messenger of Allah, may Allah bless him and grant him peace, was neither coarse nor a curser nor a reviler, He used to say when he wanted to censure someone, 'What is wrong with him? May his brow be dusty!'"
حَدَّثَنَا مُحَمَّدُ بْنُ سِنَانٍ، قَالَ: أَخْبَرَنَا فُلَيْحُ بْنُ سُلَيْمَانَ، قَالَ: حَدَّثَنَا هِلاَلُ بْنُ عَلِيٍّ، عَنْ أَنَسٍ قَالَ: لَمْ يَكُنْ رَسُولُ اللهِ صلى الله عليه وسلم فَاحِشًا، وَلاَ لَعَّانًا، وَلاَ سَبَّابًا، كَانَ يَقُولُ عِنْدَ الْمَعْتَبَةِ: مَا لَهُ تَرِبَ جَبِينُهُ.
also referenced under: Book 24, Hadith 12 (In-Book) & Book 24, Hadith 430 (English)