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 the LORD your God is giving you for your own.'"

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.