Hadith 1640
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ قَدْ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " بُعِثْتُ لأُتَمِّمَ حُسْنَ الأَخْلاَقِ " .
Yahya related to me from Malik that he had heard that the Messenger of Allah, may Allah bless him and grant him peace, said, "I was sent to perfect good character
Sahih Lighairihi (Salim al-Hilali)
Muwatta Malik 1640 · Book 47, Hadith 8