Exodus 40:34-38

34Then the cloud covered the Tent of Meeting. The glory of the Lord filled the tabernacle.

35Moses could not go into the Tent of Meeting because of the cloud and the bright glory of the Lord.

36The Israelites followed the cloud during all their journeys. Every time that the cloud rose up from the tabernacle, they would continue on their journey.

37But if the cloud remained on the tabernacle, the Israelites did not travel. They stayed where they were until the day when the cloud rose up.

38So the cloud stayed over the tabernacle during the day, to show that the Lord was with them. During the night, there was fire in the cloud. All the Israelites could see the cloud during all their journeys.