1 Samuel 30:21-25

21David came to the 200 men who had been too exhausted to go with him and had stayed in the Besor Valley. They came to meet David and the people with him. As David approached the men, he greeted them.

22Then every wicked and worthless man who had gone with David said, “Since they didn’t go with us, they shouldn’t be given any of the loot we recovered. Each of them should take only his wife and children and leave.”

23But David said, “My brothers, don’t do that with the things which the Lord has given us. He has protected us and handed the troops that attacked us over to us.

24Besides, who is going to pay attention to what you have to say in this matter? Certainly, the share of those who go into battle must be like the share of those who stay with the supplies. They will all share alike.”

25From that time on he made this a rule and a custom in Israel as it is to this day.