Deuteronomy 24:19-21

LITV(i) 19 When you cut down your harvest in your field, and have forgotten a sheaf in the field, you shall not turn back to take it. It shall be for the alien, for the orphan. and for the widow; so that Jehovah your God shall bless you in all the work of your hand. 20 When you beat your olive tree, you shall not search the branch behind you. It shall be for the alien, for the orphan, and for the widow. 21 When you gather the grapes of your vineyard, you shall not glean it afterward. It shall be for the alien, for the orphan, and for the widow.