From Sahih Bukhari (Hadith 6035):
Narrated Masruq:We were sitting with `Abdullah bin `Amr who was narrating to us (Hadith): He said, "Allah's Messenger (ﷺ) was neither a Fahish nor a Mutafahhish, and he used to say, 'The best among you are the best in character (having good manners)
Reference: Bukhari 6035