It came to pass when the congregation was assembled against Moses and against Aaron that they looked toward the Tent of Meeting, and behold, the cloud covered it and the glory of Yahweh appeared. Bible

“the glory of Yahweh appeared.” In this context, “the glory of Yahweh” was the glorious light that surrounded Yahweh. The people saw the glory and knew Yahweh Himself was present and obviously supported Moses. [For more on the glory of God, see commentary on Ezekiel 1:28].

Commentary for: Numbers 16:42