After the death of Moses, the Lord speaks to Joshua son of Nun and tells him to cross the Jordan with all the people into the land he is giving them. He marks out the borders of that land and promises that no one will be able to stand against Joshua as long as he lives, because God will be with him as he was with Moses, never leaving or forsaking him.
Three times God commands Joshua to be strong and courageous. His strength will not come from his own resources but from keeping the whole law Moses gave, turning neither right nor left. He must keep the book of the law on his lips, meditate on it day and night, and obey it; then his way will prosper. God ends by reminding him not to be afraid, because the Lord will be with him wherever he goes.
Joshua then gives orders to the officers of the people: prepare provisions, because in three days they will cross the Jordan. He turns to the Reubenites, the Gadites and the half-tribe of Manasseh, who had already received their inheritance east of the river, and reminds them of what Moses commanded: their armed men must cross ahead of their brothers and help them until they find rest. They answer that they will do all Joshua commands and go wherever he sends them, and they ask that the Lord be with him as he was with Moses. They declare that anyone who rebels against his word will die, and they tell him again: be strong and courageous.