Your wives, children and cattle may stay in the land that Moses assigned to you east of the Jordan River. But all you warriors must cross over armed for battle ahead of your brothers. You must help them
So Joshua son of Nun summoned the priests and instructed them, “Pick up the ark of the covenant, and seven priests must carry seven rams’ horns in front of the ark of the Lord.”
When Joshua gave the army its orders, the seven priests carrying the seven rams’ horns before the Lord moved ahead and blew the horns as the ark of the covenant of the Lord followed behind.