وَعَنْ جَابِرٌ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قا ل: «إِنَّ اللَّهَ بَعَثَنِي لِتَمَامِ مَكَارِمِ الْأَخْلَاقِ وَكَمَالِ محَاسِن الْأَفْعَال» . رَوَاهُ فِي شرح السّنة
Translation

Jabir reported the Prophet as saying, "God has sent me to perfect good qualities of character and to complete good deeds." It is transmitted in Sharh as-sunna.