You are not, by the favor of your Rabb, possessed (by invisible beings; the jinn)!
Al-muntakhab fi tafsir al-Qur'an al-Karim
That you, Muhammad, are not ungrateful to Allah, your Creator, for the gift He bestowed upon you, nor is the utterance ungrateful to your ear, nor are you uncontrolled by reason or a demoniac possessed by an eviI spirit