Everything in the heavens and every creature on the earth prostrates to God, as do the angels. They are not puffed up with pride. (Sura an-Nahl: 49)
Throughout history, angels have delivered God's messages to mankind. Angels appeared to many prophets, and, in some cases, to sincere believers, such as Mary, and communicated to them the commands and the divine wisdom of God. God informs us about faith in angels in the Qur'an, making it a prerequisite of faith in the Qur'an for Islam. In a verse of the Qur'an, it is stated that faith in angels is an attribute of a believer:
The Messenger has faith in what has been sent down to him from his Lord, and so do the believers. Each one has faith in God and His angels and His Books and His Messengers. We do not differentiate between any of His Messengers. They say, 'We hear and we obey. Forgive us, our Lord! You are our journey's end.' (Sura al-Baqara: 285)