Narrated `Abdullah bin `Amr: The Prophet never used bad language neither a "Fahish nor a Mutafahish. He used to say "The best amongst you are those who have the best manners and character." (See Hadith No. 56 (B) Vol. 8)
Hadith ReferenceSahih Bukhari / The Book of Virtues / Hadith: 3559
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة