O LORD of Hosts, who judges righteously,
Jeremiah calls on the LORD of Hosts, who judges righteously and tests heart and mind, to let him see God's vengeance because he has committed his cause to Him.
This verse turns the prophet's exposure into a prayer for divine justice.
18And the LORD informed me, so I knew. 19For I was like a gentle lamb led to slaughter; 20O LORD of Hosts, who judges righteously, 21Therefore this is what the LORD says concerning the people of Anathoth who are seeking your life and saying, “You must not prophesy in the name of the LORD, or you will die by our hand.” 22So this is what the LORD of Hosts says: “I will punish them. Their young men will die by the sword, their sons and daughters by famine. 23There will be no remnant, for I will bring disaster on the people of Anathoth in the year of their punishment.”