Deuteronomy 24:19-21

¹⁹When thou reapest thy 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 sojourner, for the fatherless, and for the widow; that Jehovah thy God may bless thee in all the work of thy hands. ²⁰When thou beatest thine olive-tree, thou shalt not go over the boughs again: it shall be for the sojourner, for the fatherless, and for the widow. ²¹When thou gatherest [the grapes of] thy vineyard, thou shalt not glean it after thee: it shall be for the sojourner, for the fatherless, and for the widow.