It is reported that Sufyan ibn 'Uyainah (radhiAllaahu anhu) said: Verily, the Messenger of Allah (ﷺ) is the highest standard; things are measured by him: his character, lifestyle and behavior. Whatever agrees with [these] is true and correct, and whatever contradicts [them] is wrong. [Al-Khatib Al-Baghdadi, Akhlaaq Al-Raawi wa Adaab Al-Sami’ article 8.]