Deuteronomy 3:18
Then I gave them the following instructions: 'Jehovah our God gave you the land east of the Jordan to occupy. Now arm your fighting men and send them across the Jordan ahead of the other tribes of Israel, to help them occupy their land.
Joshua 4:12-13
The children of Reuben, and the children of Gad, and half the tribe of Manasseh, passed over armed before the children of Israel, as Moses spoke to them.
Numbers 32:20-24
Moses answered: If you really mean what you say, then here in the presence of Jehovah get ready to go into battle.
Joshua 1:12-15
And to the Reubenites, and to the Gadites, and to half the tribe of Manasseh, Joshua said:
Joshua 22:1-9
Joshua called together the people of the tribes of Reuben, Gad, and Manasseh.