1 Samuel 30:21-25

21And David came to the two hundred men who had been too exhausted to follow David, and whom they had left behind at the torrent Besor; and they went forth to meet David, and to meet the people that were with him; and David drew near to the people and saluted them.

22And all the wicked men, and [men] of Belial, of those that had gone with David, answered and said, Because they went not with us, we will not give them [aught] of the spoil that we have recovered, save to every man his wife and his children, that they may lead [them] away and depart.

23Then said David, Ye shall not do so, my brethren, with that which Jehovah has given us, who has preserved us, and given the troop that came against us into our hand.

24And who will hearken to you in this matter? For as his share is that goes down to the battle, so shall his share be that abides by the baggage: they shall share alike.

25And it was [so] from that day forward; and he made it a statute and an ordinance for Israel to this day.