The Prophet (saws) was neithr a Fahish nor Mutafahhish Sahih al-Bukhari 6031
Arabic hadith text
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 قَالَلَمْ يَكُنِ النَّبِيُّ صلى الله عليه وسلم سَبَّابًا وَلاَ فَحَّاشًا وَلاَ لَعَّانًا، كَانَ يَقُولُ لأَحَدِنَا عِنْدَ الْمَعْتَبَةِ " مَا لَهُ، تَرِبَ جَبِينُهُ "
Translation
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!"