Jeremiah 40:15-16

Then Johanan the son of Kareah spoke secretly to Gedaliah in Mizpah, saying, “Let me go and kill Ishmael the son of Nethaniah, and not a man will know [who is responsible]. Why should he kill you and cause all the Jews who are gathered near you to be scattered and the remnant of Judah to perish?” But Gedaliah the son of Ahikam said to Johanan the son of Kareah, “Do not do this thing, for you are lying about Ishmael.”