Then all the Israelites left the Desert of Sin, going from place to place as they followed the Lord's commands. They camped at Rephidim, but there wasn't any water for the people to drink.
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.