Exodus 33: 7 - 11
7 Now Moses used to take the tent and pitch it outside the camp, far off from the camp; and he called it the tent of meeting. And every one who sought the LORD would go out to the tent of meeting, which was outside the camp.
8 Whenever Moses went out to the tent, all the people rose up, and every man stood at his tent door, and looked after Moses, until he had gone into the tent.
9 When Moses entered the tent, the pillar of cloud would descend and stand at the door of the tent, and the LORD would speak with Moses.
10 And when all the people saw the pillar of cloud standing at the door of the tent, all the people would rise up and worship, every man at his tent door.
11 Thus the LORD used to speak to Moses face to face, as a man speaks to his friend. When Moses turned again into the camp, his servant Joshua the son of Nun, a young man, did not depart from the tent.

EWTN