Numbers 9:21

Sometimes the cloud remained only from evening until morning; when the cloud lifted in the morning, they set out. Or if it remained a day and a night, they moved out when the cloud lifted.

Nehemiah 9:12

You led them with a pillar of cloud by day,
and with a pillar of fire by night,
to illuminate the way they should go.

Nehemiah 9:19

You did not abandon them in the wilderness
because of Your great compassion.
During the day the pillar of cloud
never turned away from them,
guiding them on their journey.
And during the night the pillar of fire
illuminated the way they should go.

Treasury of Scripture Knowledge

Summary

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.

Bible References

Abode

Nehemiah 9:12
You led them with a pillar of cloud by day,
and with a pillar of fire by night,
to illuminate the way they should go.

General references

Exodus 40:37
If the cloud was not taken up, they did not set out until the day it was taken up.
Numbers 9:16
It remained that way continuously: the cloud would cover it, appearing like fire at night.
Psalm 136:16
He led His people in the wilderness.
        His love is eternal.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.