Deuteronomy 24:20-22

24:20 When you beat your olive tree you must not repeat the procedure; the remaining olives belong to the resident foreigner, orphan, and widow. 24:21 When you gather the grapes of your vineyard you must not do so a second time; they should go to the resident foreigner, orphan, and widow. 24:22 Remember that you were slaves in the land of Egypt; therefore, I am commanding you to do all this.