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.
nasai-kubra:8404Zakariyyā b. Yaḥyá > Ibn Abū ʿUmar And ʾAbū Marwān > ʿAbd al-ʿAzīz > Yazīd b. ʿAbdullāh b. al-Hād > Muḥammad b. Nāfiʿ b. ʿUjayr from his father > ʿAlī

[Machine] The Prophet ﷺ said, "As for you, O Ali, you are my successor and trustee."  

الكبرى للنسائي:٨٤٠٤أَخْبَرَنِي زَكَرِيَّا بْنُ يَحْيَى قَالَ حَدَّثَنَا ابْنُ أَبِي عُمَرَ وَأَبُو مَرْوَانَ قَالَا حَدَّثَنَا عَبْدُ الْعَزِيزِ عَنْ يَزِيدَ بْنِ عَبْدِ اللهِ بْنِ الْهَادِ عَنْ مُحَمَّدِ بْنِ نَافِعِ بْنِ عُجَيْرٍ عَنْ أَبِيهِ عَنْ عَلِيٍّ قَالَ

قَالَ النَّبِيُّ ﷺ «أَمَّا أَنْتَ يَا عَلِيُّ فَصَفِيِّي وَأَمِينِي»