Jeremiah 40:14-15

14They asked him, “Do you know that King Baalis of the Ammonites has sent Ishmael, Nethaniah’s son, to kill you?” However, Gedaliah, son of Ahikam, didn’t believe them.

15Then Johanan, Kareah’s son, secretly asked Gedaliah at Mizpah, “Let me kill Ishmael, Nethaniah’s son. No one will know about it. Why should he kill you? All the Jews who have gathered around you would scatter. What is left of Judah would disappear.”