a few days. Hebrew "days of number": i.e. days easily counted.
according to, &c. Figure of speech Mesarchia, App-6 (twice).
Related Commentaries of Numbers 9:20
Numbers 9:20
20 And so it was, when the cloud was a few days upon the tabernacle; according to the commandment of the LORD they abode in their tents, and according to the commandment of the LORD they journeyed.