Kommentar zu Jechezkiel 1:25

And there was a voice above the expanse Jonathan rendered: And at the time that there was a will before Him to make His speech heard to His servantsthe prophets of Israelthere was a voice, and it was heard from above the expanse, from between the cherubim, from beneath the expanse that was over their heads.

they would let down their wings out of the fear of the speech.