Usul al-Kafi
Book 4:
The Book of Divine Proof

Chapter 53
Imams are not Prophets

404. 1. Imam Muhammad al-Baqir (p) was asked: What is the status of the vice-regents of the Prophet Muhammad (p)?
The Imam (p): The same as that of Dhul Qarnain (p) and the vice-regents of Prophet Sulayman (Solomon) (p) and Prophet Musa (Moses) (p).

405. 3. Imam Jafar as-Sadiq (p): Verily, God sealed the Prophethood with your Prophet Muhammad (p), so there will never be a prophet after him. And He sealed the books with your Book (Noble Quran), so there will never be a book after it. He sent down in it the knowledge of everything; the creation of the heavens and the earth, the information of what was before you, the distinctions among you, the information of what will happen after you, the affairs of paradise and the fire, and of the destination you are heading for.