From Sahih Bukhari (Hadith 3762):
Narrated `Abdur-Rahman bin Yazid:We asked Hudhaifa to tell us of a person resembling (to some extent) the Prophet (ﷺ) in good appearance and straight forward behavior so that we may learn from him (good manners and acceptable conduct). Hudhaifa replied, "I do not know anybody resembling the Prophet (to some extent) in appearance and conduct more than Ibn Um `Abd
Reference: Bukhari 3762