Deuteronomy 24:19

24:19 When you reap your harvest in your field, and have forgot a sheaf in the field, you shall not go again to get it: it shall be for the foreigner, for the fatherless, and for the widow; that Yahweh your God may bless you in all the work of your hands.
-World English Bible

Other Translation

24:19 When thou cuttest down thine harvest in thy field, and hast forgot a sheaf in the field, thou shalt not go again to fetch it: it shall be for the stranger, for the fatherless, and for the widow: that the LORD thy God may bless thee in all the work of thine hands.
-King James Version