Isaiah 6: 1-4

6 In the year that King Uzziah died, I saw the Lord, high and exalted, seated on a throne; and the train of his robe filled the temple. ² Above him were seraphim, 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:

⁴ At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke.