Tanzil

''Tanzil'' (), ''anzal'' (), and ''nuzul'' (), and other words based on the Arabic triconsonantal root (, 'downward movement'), refers to the Islamic belief in the descent of God's message from heaven to Earth as speech, and sometimes visual, revelations to the Islamic prophet Muhammad with Gabriel as the conveyor, and occasionally God himself.

In the Quran forms of these words are found in verse Q 17:105: *"And with the truth We have sent it [i.e., the Qur’ān] down, and with the truth it has descended." (Arabic: وَبِالْحَقِّ أَنْزَلْنَاهُ وَبِالْحَقِّ نَزَلَ ''wa-bi-l-ẖaqqi `anzalnahu wa-bi-l-ẖaqqi nazal''). Provided by Wikipedia