Deuteronomy 24:19-21

BSB(i) 19 If you are harvesting in your field and forget a sheaf there, do not go back to get it. It is to be left for the foreigner, the fatherless, and the widow, so that the LORD your God may bless you in all the work of your hands. 20 When you beat the olives from your trees, you must not go over the branches again. What remains will be for the foreigner, the fatherless, and the widow. 21 When you gather the grapes of your vineyard, you must not go over the vines again. What remains will be for the foreigner, the fatherless, and the widow.