Isaiah 6:2-4 Holman Christian Standard Bible (HCSB)
2 Seraphim[a] were standing above Him; each one had six wings: with two he covered his face, with two he covered his feet, and with two he flew. 3 And one called to another:
Holy, holy, holy is the Lord of Hosts;
4 The foundations of the doorways shook at the sound of their voices, and the temple was filled with smoke.