Joshua 22:8

Divide the spoil with your brethren That is, with them who stayed beyond Jordan for the defence of their land, and wives, and children, who therefore were to have a share, though not an equal share with these. “Nothing could be more just,” says Dr. Dodd, “than this command; for, notwithstanding those who remained beyond Jordan had not shared in the dangers of the war, like those who had gone through it; yet they had, during that period, watched over the families of the latter, and defended their possessions against the inroads of their surrounding enemies. This seems to have been constantly the custom among the Israelites: those who were detached upon any military expedition, gave the rest of the army a share of the booty they had taken from the enemy; the pagans acted in like manner; God himself enjoined this practice after the war against the Midianites. Those who fought kept half the spoil of the enemy, and gave the other half to the rest of the people. Probably the same proportion was observed on this occasion. David, on his return from pursuing the Amalekites, changed this custom into a law, 1 Samuel 30:24.”