The Reubenites, the Gadites, and the half-tribe of Manasseh crossed over before the Israelites, armed for battle as Moses had instructed them.

Exodus 13:18
So God led the people around by the way of the wilderness toward the Red Sea. And the Israelites left the land of Egypt arrayed for battle.

Numbers 1:24
From the sons of Gad, according to the records of their clans and families, counting the names of all those twenty years of age or older who could serve in the army,

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 little ones will remain in the fortified cities for protection from the inhabitants of the land.

Numbers 32:27
But your servants are equipped for war, and every man will cross over to the battle before the LORD, just as our lord says."

Deuteronomy 3:18
At that time I commanded you: "The LORD your God has given you this land to possess. All your men of valor are to cross over, armed for battle, ahead of your brothers, the Israelites.

Deuteronomy 33:21
He chose the best land for himself, because a ruler's portion was reserved for him there. He came with the leaders of the people; he administered the LORD's justice and His ordinances for Israel."

Joshua 4:11
and after everyone had finished crossing, the priests with the ark of the LORD crossed in the sight of the people.

Joshua 4:13
About 40,000 troops armed for battle crossed over before the LORD into the plains of Jericho.

And 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: