Isaiah 6:2-4 New International Version - UK (NIVUK)
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:
‘Holy, holy, holy is the Lord Almighty;
4 At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke.