عَنْ عَلِيِّ بْنِ الْحُسَيْنِ عَنْ اَبِيهِ عَنْ جَدِّهِ اَمِيرِ الْمُؤْمِنِينَ عَلِيِّ بْنِ اَبِي طَالِبٍ قَالَ قَالَ رَسُولُ اللهِ ﷺ اِنَّ اللهَ فَرَضَ عَلَيْكُمْ طَاعَتِي وَ نَهَاكُمْ عَنْ مَعْصِيَتِي وَ اَوْجَبَ عَلَيْكُمُ اتِّبَاعَ اَمْرِي وَ فَرَضَ عَلَيْكُمْ مِنْ طَاعَةِ عَلِيِّ بْنِ اَبِي طَالِبٍ بَعْدِي كَمَا فَرَضَ عَلَيْكُمْ مِنْ طَاعَتِي وَ نَهَاكُمْ عَنْ مَعْصِيَتِهِ وَ جَعَلَهُ اَخِي وَ وَزِيرِي وَ وَصِيِّي وَ وَارِثِي وَ هُوَ مِنِّي وَ اَنَا مِنْهُ حُبُّهُ اِيمَانٌ وَ بُغْضُهُ كُفْرٌ مُحِبُّهُ مُحِبِّي وَ مُبْغِضُهُ مُبْغِضِي وَ هُوَ مَوْلَى مَنْ اَنَا مَوْلَاهُ وَ اَنَا مَوْلَى كُلِّ مُسْلِمٍ وَ مُسْلِمَةٍ وَ اَنَا وَ هُوَ اَبَوَا هَذِهِ الْاُمَّةِ
Imam Ali Ibn al-Husain (peace be upon him) reports vide his ancestors (peace be upon him) that the Messenger of Allah (peace be upon him and his holy progeny) informed, “Surely, Allah has made obligatory my obedience upon you, prohibited you from my disobedience, has made compulsory upon you the following of my command, has made the obedience of Ali Ibn Abi Talib (peace be upon him) obligatory upon you after me just as He has made my obedience compulsory upon you and prohibited you from his disobedience; He (Allah) has made him (Ali) my brother, my vizier and my heir. He is from me and I am from him. His love is belief and hating him is disbelief. One who loves him loves me and one who bears malice against him bears malice against me. He is the master of whosoever I am his master and I am the master of every Muslim, male and female. I and he are the fathers of this nation.”
References:
1. Al-Amaali of al-Shaikh al-Saduq (r.a.), p. 14, H. 6, Majlis 4
2. Behaar al-Anwaar, vol. 26, p. 263, H. 49
3. Kanz-o-Jaame’ al-Fawaaed, vol. 2, p. 13