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

5. Muhammad ibn Yahya has narrated from Muhammad ibn ‘Abd al-Jabbar from Muhammad ibn Isma‘il from Ali ibn an-Nu‘man from ibn Muskan from abu Basir who has said the following. “Imam abu ‘Abdallah عليه السلام said to me, “O abu Muhammad, Allah, the Most Holy, the Most High, has not given anything to the prophets that He has not given to Prophet Muhammad صلى الله عليه وعلى آله وسلم. The Imams عليه السلام further said, “Allah gave to Prophet Muhammad صلى الله عليه وعلى آله وسلم all that He had given to the prophets. With us is the book about which Allah, the Most Holy, the Most High, “The books of Abraham and Moses.” I then said, “May Allah take my soul in service for your cause, are they the tablets?” The Imams عليه السلام said, “Yes, they are the tablets.”