1 Samuel 30:21-25

21When David came to the two hundred men who had been too exhausted to go with him and had been left at the Wadi Besor, they came out to meet him and to meet the troops with him. When David approached the men, he greeted them,

22but all the corrupt and worthless men among those who had gone with David argued, “Because they didn’t go with us, we will not give any of the plunder we recovered to them except for each man’s wife and children. They may take them and go.”

23But David said, “My brothers, you must not do this with what the Lord has given us. He protected us and handed over to us the raiders who came against us.

24Who can agree to your proposal? The share of the one who goes into battle is to be the same as the share of the one who remains with the supplies. They will share equally.”

25And it has been so from that day forward. David established this policy as a law and an ordinance for Israel and it still continues today.