1 Samuel 30:23-25

23But David said, “No, my brothers! Don’t be selfish with what the Lord has given us. He has kept us safe and helped us defeat the band of raiders that attacked us.

24Who will listen when you talk like this? We share and share alike—those who go to battle and those who guard the equipment.”

25From then on David made this a decree and regulation for Israel, and it is still followed today.