Al-Kāfi
Hadith 485 9ـ وَبِهَذَا الاسْنَادِ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ عَلِيِّ بْنِ أَبِي حَمْزَةَ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنِ الائِمَّةِ هَلْ يَجْرُونَ فِي الامْرِ وَالطَّاعَةِ مَجْرَى وَاحِدٍ قَالَ نَعَمْ.
9. Through the same chain of narrators it is narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from Ali ibn abu Hamza from abu Basir who has said that I asked Imam abu ‘Abdallah (a.s.) about the Imams whether in the matters of the obligation of obedience to them they are all the same or not. The Imam (a.s.) replied, “Yes, they are all the same.”