Cross reference
Deuteronomy 24:20
20 When you beat your olive tree, you shall not go over the boughs again: it shall be for the foreigner, for the fatherless, and for the widow.
Leviticus 19:10
10 You shall not glean your vineyard, neither shall you gather the fallen grapes of your vineyard; you shall leave them for the poor and for the foreigner. I am Yahweh your God.