Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:7745a –
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السيوطي:٧٧٤٥a –

"إِنَّمَا يَهْدِى أَحسنَ الأَخلاقِ وإِنَّمَا يَصْرِف سيئها هو ".  

[طب] الطبرانى في الكبير عن ابن عباس

See similar narrations below:

Collected by Ṭabarānī
tabarani:10896 – ʿAbdān b. Aḥmad > Muḥammad b. Hāshim al-Baṣrī > Shāhīn b. Ḥayyān > Ḥammād b. Salamah > ʿAmr b. Dīnār > Ṭāwus > Ibn ʿAbbās

[Machine] The Messenger of Allah ﷺ said in his sermon, "Verily, he guides to the best of manners, and indeed, he repels their evil."  

الطبراني:١٠٨٩٦ – حَدَّثَنَا عَبْدَانُ بْنُ أَحْمَدَ ثنا مُحَمَّدُ بْنُ هَاشِمٍ الْبَصْرِيُّ ثنا شَاهِينُ بْنُ حَيَّانَ ثنا حَمَّادُ بْنُ سَلَمَةَ عَنْ عَمْرِو بْنِ دِينَارٍ عَنْ طَاوُسٍ عَنِ ابْنِ عَبَّاسٍ ؓ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ فِي خُطْبَتِهِ «إِنَّمَا يَهْدِي إِلَى أَحْسَنِ الْأَخْلَاقِ وَإِنَّمَا يَصْرِفُ سَيِّئَهَا هُوَ»