Deuteronomy 24:19-21

CLV(i) 19 When you reap your harvest in your field and you have forgotten a sheaf in the field, you shall not return to take it in. For the sojourner, for the orphan and for the widow shall it be, so that Yahweh your Elohim may bless you in every work of your hands. 20 When you beat your olive tree, you shalt not go over the foliage after yourself. For the sojourner, for the orphan and for the widow shall it be. 21 When you pick the grapes of your vineyard, you shall not clean glean it after yourself. For the sojourner, for the orphan and for the widow shall it be.