1 Kings 8:9–11

There was nothing in the ark except the two tablets of stone that Moses put there at Horeb, where the Lord made a covenant with the people of Israel, when they came out of the land of Egypt. 10 And when the priests came out of the Holy Place, a cloud filled the house of the Lord, 11 so that the priests could not stand to minister because of the cloud, for the glory of the Lord filled the house of the Lord.