After three days the officers went through the camp

Joshua 1:11
"Go through the camp and tell the people, 'Prepare your provisions, for within three days you will cross the Jordan to go in and take possession of the land that the LORD your God is giving you to possess.'"

Joshua 3:3
and commanded the people: "When you see the ark of the covenant of the LORD your God being carried by the Levitical priests, you are to set out from your positions and follow it.

And it came to pass after three days, that the officers went through the host;