The cloud covered the tent of meeting, and the glory of the Lord filled the tabernacle.
References for Exodus 40:34
Moses was unable to enter the tent of meeting because the cloud rested on it, and the glory of the Lord filled the tabernacle.
The Israelites set out whenever the cloud was taken up from the tabernacle throughout all the stages of their journey.
If the cloud was not taken up, they did not set out until the day it was taken up.
For the cloud of the Lord was over the tabernacle by day, and there was a fire inside the cloud by night, visible to the entire house of Israel throughout all the stages of their journey.