In three years, as a hired worker counts the years (see also Isaiah 21:16): A man who sold himself into servitude would calculate the remaining time down to the last day. This verse refers to unknown events.
The glory of Moab will be ended, probably because of the Assyrian conquest of Moab (late 700s BC).
those who are left will be few and feeble: Though reduced by war, the Moabites still existed during Nehemiah’s time (Nehemiah 13:23).