مُوَطَّأُ مَالِكٍ
Muwatta Malik 1636
Good Character
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّ مُعَاذَ بْنَ جَبَلٍ، قَالَ آخِرُ مَا أَوْصَانِي بِهِ رَسُولُ اللَّهِ صلى الله عليه وسلم حِينَ وَضَعْتُ رِجْلِي فِي الْغَرْزِ أَنْ قَالَ أَحْسِنْ خُلُقَكَ لِلنَّاسِ يَا مُعَاذُ بْنَ جَبَلٍ .
Yahya related to me from Malik that Muadh ibn Jabal said, "The last advice the Messenger of Allah, (ﷺ), gave me when I put my foot in the stirrup was that he said, 'Make your character good for the people, Muadh ibn Jabal!' "
Arabic/English book reference: Book 47, Hadith 1