Numbers 32:17
But we will arm ourselves and be ready to go ahead of the Israelites until we have brought them into their place. Meanwhile, our dependents will remain in the fortified cities because of the inhabitants of the land.
Joshua 4:12-13
The Reubenites, Gadites, and half the tribe of Manasseh went in battle formation in front of the Israelites,
Numbers 32:29-32
Moses told them, “If the Gadites and Reubenites cross the Jordan with you, every man in battle formation before the Lord, and the land is subdued before you, you are to give them the land of Gilead as a possession.
Deuteronomy 3:18-20
“I commanded you at that time: The Lord your God has given you this land to possess. All your fighting men will cross over in battle formation ahead of your brothers the Israelites.