Isaiah 6:1-4 (AMP)
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. 2 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. 3 And one called out to another, saying, “Holy, Holy, Holy is the Lord of hosts; The whole earth is filled with His glory.” 4 And the foundations of the thresholds trembled at the voice of him who called out, and the temple was filling with smoke.