Above Him seraphim (heavenly beings) stood; each one had six wings: with two wings he covered his face, with two wings he covered his feet, and with two wings he flew. And one called out to another, saying, “Holy, Holy, Holy is the Lord of hosts; The whole earth is filled with His glory.” Isaiah 6:2-3 AMP

“But [the time is coming when] the earth shall be filled With the knowledge of the glory of the Lord, As the waters cover the sea. Habakkuk 2:14 AMP