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 - VIN
Nehemiah 9:12
12 and you led them by day by a pillar of cloud; and by night by a pillar of fire, to give them light in the way wherein to go:
Nehemiah 9:19
19 Even then, in your great mercy, you did not give them up in the waste land: the pillar of cloud still went before them by day, guiding them on their way, and the pillar of fire by night, to give them light, and make clear the way they were to go.