Jeremiah 40:13-16

13And Johanan the son of Kareah, and all the captains of the forces that were in the fields, came to Gedaliah unto Mizpah, 14and said unto him, Dost thou indeed know that Baalis the king of the children of Ammon hath sent Ishmael the son of Nethaniah to smite thee to death? But Gedaliah the son of Ahikam believed them not. 15And Johanan the son of Kareah spoke to Gedaliah in Mizpah secretly, saying, Let me go, I pray thee, and I will smite Ishmael the son of Nethaniah and no man shall know it: why should he take thy life, and all they of Judah who are gathered unto thee be scattered, and the remnant of Judah perish? 16But Gedaliah the son of Ahikam said unto Johanan the son of Kareah, Thou shalt not do this thing; for thou speakest falsely of Ishmael.