Isaiah 6:1-2

In the year that King Uzziah died, I saw [in a vision] the Lord sitting on a throne, high and exalted, with the train of His royal robe filling the [most holy part of the] temple. [John 12:41] Above Him seraphim (heavenly beings) stood; each one had six wings: with two wings he covered his face, with two wings he covered his feet, and with two wings he flew.