Jeremiah 40:15-16

Then Johanan son of Kareah took Gedaliah aside privately in Mizpah: “Let me go and kill Ishmael son of Nethaniah. No one needs to know about it. Why should we let him kill you and plunge the land into anarchy? Why let everyone you’ve taken care of be scattered and what’s left of Judah destroyed?” But Gedaliah son of Ahikam told Johanan son of Kareah, “Don’t do it. I forbid it. You’re spreading a false rumor about Ishmael.”