Joshua 1:13

And Moses said unto them, If ye will do this thing, if ye will go armed before the LORD to war, And will go all of you armed over Jordan before the LORD, until he hath driven out his enemies from before him, And the land be subdued before the LORD: then afterward ye shall return, and be guiltless before the LORD, and before Israel; and this land shall be your possession before the LORD. But if ye will not do so, behold, ye have sinned against the LORD: and be sure your sin will find you out. Build you cities for your little ones, and folds for your sheep; and do that which hath proceeded out of your mouth. And the children of Gad and the children of Reuben spake unto Moses, saying, Thy servants will do as my lord commandeth. Our little ones, our wives, our flocks, and all our cattle, shall be there in the cities of Gilead: But thy servants will pass over, every man armed for war, before the Lord to battle, as my lord saith. So concerning them Moses commanded Eleazar the priest, and Joshua the son of Nun, and the chief fathers of the tribes of the children of Israel:

And I commanded you at that time, saying, The LORD your God hath given you this land to possess it: ye shall pass over armed before your brethren the children of Israel, all that are meet for the war.

Then Joshua called the Reubenites, and the Gadites, and the half tribe of Manasseh, And said unto them, Ye have kept all that Moses the servant of the LORD commanded you, and have obeyed my voice in all that I commanded you: Ye have not left your brethren these many days unto this day, but have kept the charge of the commandment of the LORD your God. And now the LORD your God hath given rest unto your brethren, as he promised them: therefore now return ye, and get you unto your tents, and unto the land of your possession, which Moses the servant of the LORD gave you on the other side Jordan.