Jamieson, Fausset and Brown on Numbers 9:19

19. when the cloud tarried long upon the tabernacle, ... then Israel kept the charge of the Lord, and journeyed not--A desert life has its attractions, and constant movements create a passionate love of change. Many incidents show that the Israelites had strongly imbibed this nomad habit and were desirous of hastening to Canaan. But still the phases of the cloud indicated the command of God: and whatsoever irksomeness they might have felt in remaining long stationary in camp, "when the cloud tarried upon the tabernacle many days, they kept the charge of the Lord, and journeyed not." Happy for them had they always exhibited this spirit of obedience! and happy for all if, through the wilderness of this world, we implicitly follow the leadings of God's Providence and the directions of God's Word!