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:163 – Isḥāq b. Ibrāhīm al-Dabarī > ʿAbd al-Razzāq > Maʿmar > Qatādah > al-Ḥasan And Ghayrih

[Machine] "The first person to believe in Ali ibn Abi Talib was when he was fifteen or sixteen years old."  

الطبراني:١٦٣ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ الدَّبَرِيُّ عَنْ عَبْدِ الرَّزَّاقِ عَنْ مَعْمَرٍ أَخْبَرَنِي قَتَادَةُ عَنِ الْحَسَنِ وَغَيْرِهِ قَالَ

«فَكَانَ أَوَّلَ مَنْ آمَنَ عَلِيُّ بْنُ أَبِي طَالِبٍ وَهُوَ ابْنُ خَمْسَ عَشْرَةَ أَوْ سِتَّ عَشْرَةَ»