1 Samuel 30:23-25

23David replied, “No, my brothers, you must not do that with what the Lord has given us. He has protected us and delivered into our hands the raiding party that came against us.

24Who will listen to what you say? The share of the man who stayed with the supplies is to be the same as that of him who went down to the battle. All will share alike.”

25David made this a statute and ordinance for Israel from that day to this.