19 When the cloud remained over the tabernacle a long time, the Israelites obeyed the LORD’s order and did not set out.

Read Numbers 9:19 Using Other Translations

And when the cloud tarried long upon the tabernacle many days, then the children of Israel kept the charge of the LORD, and journeyed not.
Even when the cloud continued over the tabernacle many days, the people of Israel kept the charge of the LORD and did not set out.
If the cloud remained over the Tabernacle for a long time, the Israelites stayed and performed their duty to the LORD .