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
tabarani:16435 – Yaḥyá b. ʿUthmān b. Ṣāliḥ

[Machine] The Messenger of Allah ﷺ said, "Do not revile Ali, for he was closely connected with the essence of Allah."  

الطبراني:١٦٤٣٥ – حَدَّثَنَا يَحْيَى بْنُ عُثْمَانَ بْنِ صَالِحٍ ثنا سُفْيَانُ بْنُ بِشْرٍ الْكُوفِيُّ ثنا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ عَنْ يَزِيدَ بْنِ أَبِي زِيَادٍ عَنْ إِسْحَاقَ بْنِ كَعْبِ بْنِ عُجْرَةَ عَنْ أبِيهِ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «لَا تَسُبُّوا عَلِيًّا فَإِنَّهُ كَانَ مَمْسُوسًا فِي ذَاتِ اللهِ ﷻ»  

See similar narrations below:

Collected by Suyūṭī