"He sends down the angels with the Spirit [ar-Ruh]" (in the Tafsir of al-Suddi) "of His command" meaning: by His command.

Muhammad said: "Revelation [al-Wahy] is called Spirit [Ruh] because through it there is life from ignorance."

"Upon whom He wills of His servants, [saying], 'Warn [mankind] that there is no deity except Me, so fear Me'" meaning: do not worship any god alongside Me.