Jeremiah 40:15

Then Johanan the son of Kareah spake to Gedaliah in Mizpah secretly, saying, Let me go, I pray thee, and I will slay Ishmael the son of Nethaniah, and no man shall know it: wherefore should he take thy life, that all the Jews which are gathered unto thee should be scattered, and the remnant of Judah perish?