Risalah means prophethood or messengership and represents the various ways Allah communicates with humanity.
Islamic belief teaches that Allah wants to help people live good lives and so he sends messages about how to do this. Many of these messages are found in the Qur’an. Muslims believe that messages from Allah are communicated through prophets, or nubuwwah.
We make no distinction between any of them(Qur’an 2:136).
We believe in Allah, and the revelation given to us, and to Abraham, Ismail, Isaac, Jacob and the tribes, and that given to Moses and Jesus, and that given to (all) prophets from their Lord: we make no difference between one and another of them: and we bow to Allah.Qur’an 2:136
All of the prophets received the same message about the one God, which shows that Allah is unchanging and that Islam is the true religion. Muhammad was the final prophet.