Isaiah 6:1, 2, 3

It was in the year King Uzziah died that I saw the Lord. He was sitting on a lofty throne, and the train of his robe filled the Temple.

Attending him were mighty seraphim, each having six wings. With two wings they covered their faces, with two they covered their feet, and with two they flew.

They were calling out to each other, “Holy, holy, holy is the LORD of Heaven’s Armies! The whole earth is filled with his glory!”