Belief in the Books and the Messengers means affirming that Allāh sent prophets and revealed scriptures to guide humanity. This includes believing in all the prophets, such as Noah, Abraham, Moses, Jesus, and Muhammad (peace be upon them all), each sent to call people to the worship of Allāh alone. It also involves believing in the divine scriptures revealed to them, including the Torah given to Moses, the Psalms to David, the Gospel to Jesus, and the Qur’an to Muhammad, which is the final and complete revelation, confirming the previous scriptures.
Allāh says in the Qur’an:
“We have sent you with the truth, as a bearer of glad tidings and a warner. And there is no nation but that a warner has passed among them.”
— Surah Fatir (35:24)