21 Sometimes the cloud was from evening until morning; and when the cloud was taken up in the morning, they traveled; or by day and by night, when the cloud was taken up, they traveled.
Numbers 9:21 Cross References - WEB
Nehemiah 9:12
12 Moreover, in a pillar of cloud you led them by day; and in a pillar of fire by night, to give them light in the way in which they should go.
Nehemiah 9:19
19 yet you in your manifold mercies didn’t forsake them in the wilderness. The pillar of cloud didn’t depart from over them by day, to lead them in the way; neither did the pillar of fire by night, to show them light, and the way in which they should go.