Numbers Chapter 9, Verse 21
From BibleWiki
21: And so it was, when the cloud abode from even unto the
morning, and that the cloud was taken up in the morning, then
they journeyed: whether it was by day or by night that the
cloud was taken up, they journeyed.
21: If the cloud tarried from evening until morning, and immediately
at break of day left the tabernacle, they marched forward: and if it
departed after a day and a night, they took down their tents.
21: And it shall come to pass, whenever the cloud shall remain from the evening till the morning, and in the morning the cloud shall go up, then shall they remove by day or by night.
Numbers Chapter 9, Verse 21/commentary

