The Imams عليه السلام inherited the knowledge of the Holy prophet صلى الله عليه وعلى آله وسلم and all the prophets and their successors before them

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from ‘Abd al-Rahman ibn Kathir from abu Ja‘far عليه السلام who has said the following. “The Messenger of Allah has said, ‘The first successor and executor of the will on earth was Hibbatullah, the son of Adam. No prophet has ever left this world without first leaving behind one who would execute his will. The prophets were one hundred twenty thousand persons. Five of them were commissioned Messengers, like Noah, Abraham, Moses, Jesus, and Muhammad صلى الله عليه وعلى آله وسلم Ali ibn Abu Talib عليه السلام was the Hibbatullah for Muhammad صلى الله عليه وعلى آله وسلم. He inherited the knowledge of the executors of the wills of the prophets and the knowledge of those who were before him. (Is not it true) that Muhammad صلى الله عليه وعلى آله وسلم inherited the knowledge of the prophets and the Messengers who lived before him? It is written on the columns of the throne, “Hamza is the lion of Allah and the lion of His Messenger. He (Hamza) is the master of the martyrs. On top of the throne is Amir al-Mu’minin Ali عليه السلام. This is evidence against those who deny our rights and refuse to yield to us our right of inheritance. We are not forbidden to speak. Before us is all certainty. What supporting evidence could be more clear than this.”