Deuteronomy 24:20-21

CLV^{(i) 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.