رَسُولُ اللَّهِ ص الْمُنْذِرُ وَ لِكُلِّ زَمَانٍ مِنَّا هَادٍ يَهْدِيهِمْ إِلَى مَا جَاءَ بِهِ- نَبِيُّ اللَّهِ ص ثُمَّ الْهُدَاةُ مِنْ بَعْدِهِ عَلِيٌّ ثُمَّ الْأَوْصِيَاءُ وَاحِدٌ بَعْدَ وَاحِدٍ.
The Imam (a.s.) said that at all times there is a guide from us who guides people to the teachings of the Holy Prophet (s.a.) Of the guides who possess Divine authority after the holy Prophet (s.a.) is Amir al-Mu’minin (a.s.) and his successors one after the other.”