So Joshua ordered the officers of the people: 11 “Go through the campand tell the people, ‘Get your provisions ready. Three days from now you will cross the Jordan here to go in and take possession of the land the Lord your God is giving you for your own.’”
12 But to the Reubenites, the Gadites and the half-tribe of Manasseh,Joshua said, 13 “Remember the command that Moses the servant of the Lord gave you after he said, ‘The Lord your God will give you rest by giving you this land.’ 14 Your wives, your children and your livestock may stay in the land that Moses gave you east of the Jordan, but all your fighting men, ready for battle, must cross over ahead of your fellow Israelites. You are to help them 15 until the Lord gives them rest, as he has done for you, and until they too have taken possession of the land the Lord your God is giving them. After that, you may go back and occupy your own land, which Moses the servant of the Lord gave you east of the Jordan toward the sunrise.”
16 Then they answered Joshua, “Whatever you have commanded us we will do, and wherever you send us we will go. 17 Just as we fully obeyed Moses, so we will obey you. Only may the Lord your God be with you as he was with Moses. 18 Whoever rebels against your word and does not obey it, whatever you may command them, will be put to death. Only be strong and courageous!”
Walking With God 