“Hā Mīm. The revelation of the Book is from Allah, the Almighty, the All-Wise.”

Likewise:

“Hā Mīm. A revelation from the Most Compassionate, the Most Merciful.”

“Hā Mīm. The revelation of the Book is from Allah, the Almighty, the All-Knowing.”

“Revelation” here denotes what is sent down: the verbal noun is used to name its object, a common usage. Hence the early generations said: “The Quran is the speech of Allah, uncreated; from Him it originated.” Ahmad and others said: “And to Him it returns.” That is, He is the One who speaks it. He also said: “Allah’s speech is from Allah; it is not separate from Him.” That is, He did not create it in something else, such that it would originate in, and be sent down from, that created thing. Rather, it is sent down from Allah, as He has stated. It originated from Allah, not from a created being: He is the One who spoke it to His creation.

As for descent “specified” as being from heaven, this occurs in His saying:

“And We sent down from heaven.”

“Heaven” is a generic term for everything above. When qualified by a particular referent, its meaning is restricted accordingly. Thus, His words “from heaven,” occurring in several passages, are unqualified, referring to what is above. He then clarifies this elsewhere by saying:

“Is it you who bring it down from the clouds?”

And:

“Then you see the rain emerge from within them.”

That is, it is sent down from the clouds. Resembling the descent of the Quran is His saying:

“He sends down the angels with the inspiration of His command upon whomever He wills of His servants.”

The angels’ descent is thus their descent with revelation from His command, which is His speech. Likewise, His saying:

“The angels and the Spirit descend therein,”

corresponds to His saying:

“Therein every wise decree is made distinct—a command from Us. Indeed, it is We who send messengers.”

This resembles His saying:

“Say: The Holy Spirit has brought it down.”