John Calvin Commentary Micah 6:15

"Thou shalt sow, but shalt not reap; thou shalt tread the olives, but shalt not anoint thee with oil; and the vintage, but shalt not drink the wine." — Micah 6:15 (ASV)

The Prophet adds another kind of punishment, which was to follow the calamity threatened in the last verse. He had said that those who escaped would ultimately be destroyed by the sword; he says now that the whole land would fall prey to enemies. And he took his words from Moses, for it was common for the prophets, when they wished to secure greater authority for themselves, to quote literally the curses contained in the Law, as in the present instance (see Deuteronomy 28 and Leviticus 26).

Now it is well known that God denounced this punishment, among others, on the people: that when they sowed their fields, another would reap; and that when they cultivated their vineyards with great labor, others would become the vintagers. The meaning is that whatever fruit the land produced would come into the hands of enemies, for all things would be exposed to plunder. Now it is a very grievous thing when we see not only our provisions consumed by enemies but also the fruit of our labor; which is the same as if they were to drink our blood, for the labor of man is often compared to blood, because labor causes perspiration.