Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 759

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)

Source materials are from the University of Southern California MSA site
Hadith eBooks converted from Imaan Star