(38) باب لَمْ يَكُنِ النَّبِيُّ صلى الله عليه وسلم فَاحِشًا وَلاَ مُتَفَحِّشًا
Narrated Anas bin Malik:
The Prophet (ﷺ) was not one who would abuse (others) or say obscene words, or curse (others), and if he wanted to admonish anyone of us, he used to say: "What is wrong with him, his forehead be dusted!"
Reference: Sahih al-Bukhari 6031
In-book reference: Book 78, Hadith 61
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 58