Muwatta Malik · Hadith 1746

وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّهُ كَانَ يَقُولُ الْقَصْدُ وَالْتُّؤَدَةُ وَحُسْنُ السَّمْتِ جُزْءٌ مِنْ خَمْسَةٍ وَعِشْرِينَ جُزْءًا مِنَ النُّبُوَّةِ ‏.‏

Yahya related to me from Malik that he had heard that Abdullah ibn Abbas said, "Equanimity, gentleness, and good behaviour are one twenty-fifth of prophecy

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).