Numbers 9:18-20

Young's Literal Translation

¹⁸ by the command of Jehovah the sons of Israel journey, and by the command of Jehovah they encamp; all the days that the cloud doth tabernacle over the tabernacle they encamp.

¹⁹ And in the cloud prolonging itself over the tabernacle many days, then have the sons of Israel kept the charge of Jehovah, and journey not,

²⁰ and so when the cloud is a number of days over the tabernacle; by the command of Jehovah they encamp, and by the command of Jehovah they journey.