Put the Levites in charge of the Tabernacle and of the Testimony, as well as all its furniture and everything it contains. They are the ones responsible for carrying the Tabernacle and all its items. They are to care for it, and to make their camp around it.
Of all the Israelites, the Levites are a gift from me to Aaron and his sons to serve the Israelites at the Tent of Meeting, and on their behalf to set them right, so that nothing bad will happen to them when they come to the sanctuary.”
The Levites purified themselves and washed their clothes. Then Aaron presented them as a wave offering to the Lord. Aaron also presented the sacrifice to make them right with the Lord so they would be clean.
If the cloud stayed in one place for two days, or a month, or longer, the Israelites stayed where they were and didn't leave as long as the cloud remained over the Tabernacle. However, once it rose, they would leave.
So they kept the Passover in the Sinai desert, beginning in the evening after sunset on the fourteenth day of the first month. The Israelites followed all the instructions the Lord had given to Moses.