Nahj al-Balāgha
Hadith 1761١٥٦. وَقَالَ (عليه السلام): عَلَيْكُمْ بِطَاعَةِ مَنْ لَا تُعْذَرُونَ بِجَهَالَتِهِ.
156. Amīr al-mu’minīn, peace be upon him, said: On you lies (the obligation of) obedience to the person about whom you cannot plead the excuse of ignorance. [1]