Joshua 1:13
“Remember the word which Moses the servant of the Lord commanded you, saying, The Lord your God hath given you rest, and hath given you this land.”
Pass through the host, and command the people, saying, Prepare you victuals; for within three days ye shall pass over this Jordan, to go in to possess the land, which the Lord your God giveth you to possess it.
And to the Reubenites, and to the Gadites, and to half the tribe of Manasseh, spake Joshua, saying,
Remember the word which Moses the servant of the Lord commanded you, saying, The Lord your God hath given you rest, and hath given you this land.
Your wives, your little ones, and your cattle, shall remain in the land which Moses gave you on this side Jordan; but ye shall pass before your brethren armed, all the mighty men of valour, and help them;
Until the Lord have given your brethren rest, as he hath given you, and they also have possessed the land which the Lord your God giveth them: then ye shall return unto the land of your possession, and enjoy it, which Moses the Lord’s servant gave you on this side Jordan toward the sunrising.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And Moses said unto them, If ye will do this thing, if ye will go armed before the Lord to war,”
“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.”
“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:”
“When thou art come unto the land which the Lord thy God giveth thee, and shalt possess it, and shalt dwell therein, and shalt say, I will set a king over me, like as all the nations that are about me;”
“Then Joshua called the Reubenites, and the Gadites, and the half tribe of Manasseh,”