Charles Ellicott Commentary Numbers 9:19

"And when the cloud tarried upon the tabernacle many days, then the children of Israel kept the charge of Jehovah, and journeyed not." — Numbers 9:19 (ASV)

Kept the charge of the Lord. —The same expression is used of Aaron and his sons in Leviticus 8:35, and also in respect to the office of the Levites in Numbers 3:7, as keeping the charge of Aaron and of the congregation. It is also used of the people generally in 2 Chronicles 23:6, in regard to the charge or “watch” of the Lord. It may imply that the people were to engage in acts of religious worship, or it may denote adherence to the Divine commands and ordinances generally, as in Ezekiel 48:11.