Islam is clear on the nature of angels in that they are messengers of God. They have no free will and can do only what God orders them to do. Belief in angels is fundamental to the faith of Islam. The Arabic word for angel (Malak) means “messenger”, like its counterparts in Hebrew (Malakh) and Greek (Angelos). According to the Qur’an, angels do not possess free will and worship God in total obedience. The Qur’an describes angels as “messengers with wings—two, or three, or four (pairs): He [God] adds to Creation as He pleases…”
There is no standard hierarchical organization in Islam that parallels the division into different “choirs” or spheres, as hypothesized and drafted by early medieval Christian theologians. Most[who?] Islamic scholars agree that this is an unimportant topic in Islam, especially since such a topic has never been directly mentioned or addressed in the Qur’an. However, it is clear that there is a set order or hierarchy that exists between angels, defined by the assigned jobs and various tasks to which angels are commanded by God. The angel Gabriel (Jibreel) is the most recognized angel, as in Islam this angel delivers the message of God (in the case of the Islamic prophet, Muhammad, the Qur’an) to the prophets.