‘ Now to the one half tribe of Manasseh Moses had given inheritance in Bashan, but to the other half gave Joshua an inheritance among their brothers in Beyond Jordan westward. And when Joshua sent them away to their tents, he blessed them, and spoke to them, saying, “Return with much wealth to your tents and with a great deal of cattle, with silver, and with gold, and with bronze, and with iron, and with a great deal of clothing. Divide the spoil of your enemies with your brothers.'
Joshua 22:7 a is really a parenthesis reminding the listeners of the twofold nature of Manasseh, in view of the strange nature of the split tribe, a reminder required when the account would be read in instalments. Then Joshua 22:6 continues in Joshua 22:7 b, for all the Transjordan tribes would share the spoil. The spoils were defined first in terms of cattle, the most important of all to such people, then in terms of valuable metals, and finally in terms of clothing.
“Return -- to your tents.” Here the phrase unquestionably means ‘return home'.
“Divide the spoil of your enemies with your brothers.” This means that the men returning home should share the spoils with the fellow tribespeople who had remained to settle into the land, the older men and the families. It is unlikely that we are to see it as telling the half tribe of Manasseh to share their spoil with Reuben and Gad, or with the other half of the tribe, for no reason is given as to why the half tribe should be treated as distributors, while we do expect all the Transjordan tribes to receive spoil, and the comment about Manasseh reads like a parenthesis.