Exodus 40:35-37

Young's Literal Translation

³⁵ and Moses hath not been able to go in unto the tent of meeting, for the cloud hath tabernacled on it, and the honour of Jehovah hath filled the tabernacle.

³⁶ And in the going up of the cloud from off the tabernacle the sons of Israel journey in all their journeys;

³⁷ and if the cloud go not up then they journey not, until the day of its going up: