For thus says the Lord to the men of Judah and Jerusalem: “Break up your fallow ground, and do not sow among thorns. Circumcise yourselves to the Lord, and take away the foreskins of your hearts, you men of Judah and inhabitants of Jerusalem, lest My fury come forth like fire, and burn so that no one can quench it, because of the evil of your doings.” Jeremiah 4:3-4
Fallow ground is ground that in years past brought forth a crop, but now is standing idle, unplanted. Jeremiah uses the metaphor to call the people back to the way they once lived, to the commitment they once made.
