Deuteronomy 3:18
And I commanded you the same time, ye Reuben and Gad, saying, 'The LORD your God hath given you this land to enjoy it: see that ye go harnessed before your brethren the children of Israel, all that are men of war among you.
Joshua 4:12-13
And the children of Reuben, and the children of Gad, and half the tribe of Manasseh went before the children of Israel, armed, as Moses charged them.
Numbers 32:20-24
And Moses said unto them, "If ye will do this thing, that ye will go all harnessed before the LORD to war,
Joshua 1:12-15
And unto the Reubenites, Gadites, and half the tribe of Manasseh spake Joshua, saying,
Joshua 22:1-9
Then Joshua called unto the Reubenites, the Gadites and to the half tribe of Manasseh,