Isaiah 6:1-3 (New International Version)

¹ In the year that King Uzziah died, I saw the Lord seated on a throne, high and exalted, and the train of his robe filled the temple. ² Above him were seraphs, each with six wings: With two wings they covered their faces, with two they covered their feet, and with two they were flying. ³ And they were calling to one another:
"Holy, holy, holy is the LORD Almighty;
the whole earth is full of his glory."