Mosaic legislation provided for meeting the needs of the poor among Israel:
19 “When you reap your harvest in your field and forget a sheaf in the field, you shall not go back to get it. It shall be for the sojourner, the fatherless, and the widow, that the LORD your God may bless you in all the work of your hands. 20 When you beat your olive trees, you shall not go over them again. It shall be for the sojourner, the fatherless, and the widow. 21 When you gather the grapes of your vineyard, you shall not strip it afterward. It shall be for the sojourner, the fatherless, and the widow. 22 You shall remember that you were a slave in the land of Egypt; therefore I command you to do this (Deuteronomy 24:19-22, ESV).
One instance of the application of these provisions of gleaning after the harvest being left for the poor is found in the book of Ruth (see esp. ch. 2). This text also forms the backdrop for the rhetorical question of Obadiah 1:5 (context: complete destruction of Edom; no “gleaning” to be left.”
I’m also interest in the inclusion of the olive tree in the Deuteronomy text. Olives were a staple in biblical times. Olive trees are plentiful in Israel today, requiring little water, and can be grown on almost any terrain (including land too steep for farming). Again, the Deuteronomy legislation required that the owners left whatever remained after harvest for the poor of the land.
On a recent trip to Israel we spent one day visiting sites in the West Bank (PA), including Shechem. While there we saw some folks (a family?) gathering olives. The work is largely done by hand.
Behind these folks, but out of sight, is Mt. Gerizim.
Here is a close-up. It looks like they have a tarp of some kind to catch the olives.
I think they were looking to see who that was taking their photo, you think?
Click on images for larger view.