The corpus of shia Hadeeth that have been preserved over the centuries are made up of the narrations and teachings that go back to the Prophet and the 12 imams. The majority of these narrations come to us from Imam al Baqir and Imam al Sadiq AS who had more freedom to teach than the other Imams. After them, it is the sayings and teachings from Imam Al Kadhim that have been preserved the most.