I Samuel 30:21-25

Now David came to the two hundred men who had been so weary that they could not follow David, whom they also had made to stay at the Brook Besor. So they went out to meet David and to meet the people who were with him. And when David came near the people, he greeted them. Then all the wicked and worthless men of those who went with David answered and said, “Because they did not go with us, we will not give them any of the spoil that we have recovered, except for every man’s wife and children, that they may lead them away and depart.” But David said, “My brethren, you shall not do so with what the LORD has given us, who has preserved us and delivered into our hand the troop that came against us. For who will heed you in this matter? But as his part is who goes down to the battle, so shall his part be who stays by the supplies; they shall share alike.” So it was, from that day forward; he made it a statute and an ordinance for Israel to this day.