New Living Translation
Sometimes the cloud stayed only overnight and lifted the next morning. But day or night, when the cloud lifted, the people broke camp and moved on.

American Standard Version
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.

Berean Study Bible
Sometimes the cloud remained only from evening until morning, and when it lifted in the morning, they would set out. Whether it was by day or by night, when the cloud was taken up, they would set out.

Douay-Rheims Bible
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.

English Revised Version
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.

King James Bible
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.

World English Bible
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.

Young's Literal Translation
And so when the cloud is from evening till morning, when the cloud hath gone up in the morning, then they have journeyed; whether by day or by night, when the cloud hath gone up, then they have journeyed.

Numbers 9:21 Additional Translations ...