NET

21 And when the cloud remained only from evening until morning, when the cloud was taken up the following morning, then they traveled on. Whether by day or by night, when the cloud was taken up they traveled.

Darby

21 And if it were so that the cloud was there from the evening until the morning, and that the cloud was taken up in the morning, then they journeyed; or a day and a night, and the cloud was taken up, they journeyed;

KJV

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.