Numbers 32:20-24

32:20 Then Moses replied, “If you will do this thing, and if you will arm yourselves for battle before the Lord, 32:21 and if all your armed men cross the Jordan before the Lord until he drives out his enemies from his presence 32:22 and the land is subdued before the Lord, then afterward you may return and be free of your obligation to the Lord and to Israel. This land will then be your possession in the Lord’s sight.

32:23 “But if you do not do this, then look, you will have sinned against the Lord. And know that your sin will find you out. 32:24 So build cities for your descendants and pens for your sheep, but do what you have said you would do.”

Joshua 1:12-15

1:12 Joshua told the Reubenites, Gadites, and the half tribe of Manasseh: 1:13 “Remember what Moses the Lord’s servant commanded you. The Lord your God is giving you a place to settle and is handing this land over to you. 1:14 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 1:15 until the Lord gives your brothers a place like yours to settle and they conquer the land the Lord your God is ready to hand over to them. Then you may go back to your allotted land and occupy the land Moses the Lord’s servant assigned you east of the Jordan.”

Joshua 4:12-13

4:12 The Reubenites, Gadites, and the half-tribe of Manasseh crossed over armed for battle ahead of the Israelites, just as Moses had instructed them. 4:13 About forty thousand battle-ready troops marched past the Lord to fight on the plains of Jericho.

Joshua 22:1-9

Joshua Sends Home the Eastern Tribes

22:1 Then Joshua summoned the Reubenites, Gadites, and the half-tribe of Manasseh 22:2 and told them: “You have carried out all the instructions of Moses the Lord’s servant, and you have obeyed all I have told you. 22:3 You have not abandoned your fellow Israelites this entire time, right up to this very day. You have completed the task given you by the Lord your God. 22:4 Now the Lord your God has made your fellow Israelites secure, just as he promised them. So now you may turn around and go to your homes in your own land which Moses the Lord’s servant assigned to you east of the Jordan. 22:5 But carefully obey the commands and instructions Moses the Lord’s servant gave you. Love the Lord your God, follow all his instructions, obey his commands, be loyal to him, and serve him with all your heart and being!”

22:6 Joshua rewarded them and sent them on their way; they returned to their homes. 22:7 (Now to one half-tribe of Manasseh, Moses had assigned land in Bashan; and to the other half Joshua had assigned land on the west side of the Jordan with their fellow Israelites.) When Joshua sent them home, he rewarded them, 22:8 saying, “Take home great wealth, a lot of cattle, silver, gold, bronze, iron, and a lot of clothing. Divide up the goods captured from your enemies with your brothers.” 22:9 So the Reubenites, Gadites, and half-tribe of Manasseh left the Israelites in Shiloh in the land of Canaan and headed home to their own land in Gilead, which they acquired by the Lord’s command through Moses.