The insertion of this explanation about the half tribe, and the repetition of Joshua’s farewell, are examples of a marked characteristic of very ancient writers and of Hebrew writers as much as any - that of giving a completeness and finish to each section of their story. The Jewish historian scarcely ever quotes or reminds, but repeats so much as may be necessary to make his account of the transaction in hand fully intelligible by itself. (Compare also Joshua 13:14, Joshua 13:33; Joshua 14:3; Joshua 18:7.) It is quite possible, however, that the particulars special to Joshua 22:8, may be due to some other narrative of the whole event than that to which Joshua 22:5 belongs, and may have been interwoven by a later reviser.
Related Commentaries of Joshua 22:7
Joshua 22:7-8
7 Now to the one half of the tribe of Manasseh Moses had given possession in Bashan: but unto the other half thereof gave Joshua among their brethren on this side Jordan westward. And when Joshua sent them away also unto their tents, then he blessed them,
8 And he spake unto them, saying, Return with much riches unto your tents, and with very much cattle, with silver, and with gold, and with brass, and with iron, and with very much raiment: divide the spoil of your enemies with your brethren.