Deuteronomy 24:20-21

ASV(i) 20 When 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. 21 When 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.