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
bayhaqi:12160 – Abū al-Ḥusayn b. al-Faḍl al-Qaṭṭān> ʿAbdullāh b. Jaʿfar > Yaʿqūb b. Sufyān > Yaḥyá b. ʿAbdullāh b. Bukayr > al-Layth b. Saʿd > Abū al-Aswad > ʿUrwah > Aslam

[Machine] Ali embraced Islam when he was eight years old.  

البيهقي:١٢١٦٠ – أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ الْفَضْلِ الْقَطَّانُ بِبَغْدَادَ أنبأ عَبْدُ اللهِ بْنُ جَعْفَرٍ ثنا يَعْقُوبُ بْنُ سُفْيَانَ ثنا يَحْيَى بْنُ عَبْدِ اللهِ بْنِ بُكَيْرٍ حَدَّثَنِي اللَّيْثُ بْنُ سَعْدٍ حَدَّثَنِي أَبُو الْأَسْوَدِ عَنْ عُرْوَةَ قَالَ

أَسْلَمَ عَلِيٌّ ؓ وَهُوَ ابْنُ ثَمَانِ سِنِينَ  

See similar narrations below:

Collected by Ṭabarānī
tabarani:162 – Abū al-Zinbāʿ Rawḥ b. al-Faraj al-Miṣrī > Yaḥyá b. Bukayr > Ibn Lahīʿah And al-Layth b. Saʿd > Abū al-Aswad > ʿUrwah b. al-Zubayr

[Machine] "Ali ibn Abi Talib embraced Islam at the age of eight."  

الطبراني:١٦٢ – حَدَّثَنَا أَبُو الزِّنْبَاعِ رَوْحُ بْنُ الْفَرَجِ الْمِصْرِيُّ ثنا يَحْيَى بْنُ بُكَيْرٍ ثنا ابْنُ لَهِيعَةَ وَاللَّيْثُ بْنُ سَعْدٍ عَنْ أَبِي الْأَسْوَدِ عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ قَالَ

«أَسْلَمَ عَلِيُّ بْنُ أَبِي طَالِبٍ وَهُوَ ابْنُ ثَمَانِ سِنِينَ»  

tabarani:166 – Aḥmad b. Zayd > Ibrāhīm b. al-Mundhir > Sufyān > Jaʿfar b. Muḥammad from his father

[Machine] "Ali died when he was fifty-eight years old."  

الطبراني:١٦٦ – حَدَّثَنَا أَحْمَدُ بْنُ زَيْدٍ ثنا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ ثنا سُفْيَانُ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ قَالَ

«تُوُفِّيَ عَلِيٌّ وَهُوَ ابْنُ ثَمَانٍ وَخَمْسِينَ»