Num Numbers, chapter Book of Numbers, chapter 9
And sometimes the cloud was a few days upon the tabernacle; according to the commandment of the LORD they remained encamped, and according to the commandment of the LORD they journeyed. And sometimes the cloud was from evening until morning; and when the cloud was taken up in the morning, they journeyed; or if it continued by day and by night, when the cloud was taken up, they journeyed.