1 Samuel 30:24-26

30:24 Who will listen to you in this matter? The portion of the one who went down into the battle will be the same as the portion of the one who remained with the equipment! Let their portions be the same!”

30:25 From that time onward it was a binding ordinance for Israel, right up to the present time.

30:26 When David came to Ziklag, he sent some of the plunder to the elders of Judah who were his friends, saying, “Here’s a gift for you from the looting of the Lord’s enemies!”