'Edge of the Sword' in the Bible

And afterward, says Jehovah, I will deliver Zedekiah king of Judah, and his servants, and the people, and those who are left in this city from the plague, from the sword, and from the famine, into the hand of Nebuchadnezzar king of Babylon, and into the hand of their enemies, and into the hand of those who seek their life. And he shall strike them with the edge of the sword; he shall not spare them, nor have pity, nor have mercy.