Ezekiel 21-23
In chapter 21 the Lord instructs Ezekiel to groan and mourn for the coming devastation that will be coming against those who are still in Judah and Jerusalem, as the king (Nebuchadnezzar) will not stand for the rebellion of Zedekiah, and there will be great numbers killed in the siege.
In chapter 22 the Lord recounts the multitude of sins that were being committed in Jerusalem, with much blood shed, immorality, worship of false gods, and injustice against the poor and helpless. The Lord searched for even one man who would stand in the gap and intercede before Him on behalf of the people, but He found no one, and His wrath will be poured out.
In chapter 23 the Lord tells a parable of two sisters who became harlots, and who lusted after foreign lovers. The older sister represented the northern kingdom of Israel and Samaria, who lusted after the Assyrians, and the Lord brought the Assyrians against Israel and took them all away. The younger sister represented Judah and Jerusalem, who lusted after the Chaldeans in Babylon, and thus the Lord was giving her over to the Babylonians, who would treat her like Assyria treated Israel.