Sahih al-Bukhari 6031
Sahih al-Bukhari · Book 78: Good Manners and Form (Al-Adab) · The Prophet (saws) was neithr a Fahish nor Mutafahhish
Narrated Anas bin Malik:
حَدَّثَنَا أَصْبَغُ ، قَالَ أَخْبَرَنِي ابْنُ وَهْبٍ ، أَخْبَرَنَا أَبُو يَحْيَى، هُوَ فُلَيْحُ بْنُ سُلَيْمَانَ عَنْ هِلاَلِ بْنِ أُسَامَةَ ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ قَالَ لَمْ يَكُنِ النَّبِيُّ صلى الله عليه وسلم سَبَّابًا وَلاَ فَحَّاشًا وَلاَ لَعَّانًا، كَانَ يَقُولُ لأَحَدِنَا عِنْدَ الْمَعْتَبَةِ " مَا لَهُ، تَرِبَ جَبِينُهُ " .
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!"