And there was a voice from the firmament that [was] over their heads,.... Which was the voice of Christ upon the throne, above the firmament, over the heads of the living creatures; which directed them when and where to go, and what to do, and when and where to stop:
when they stood, [and] had let down their wings; either encouraging them to lift them up, and go on in their work, notwithstanding the sense they had of their own weakness and unworthiness; or, having done their work, calling them to himself in heaven.