Jeremiah 40:15 in the King James Version
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 slay thee, that all the Jews which are gathered unto thee should be scattered, and the remnant in Judah perish?
Context
14 and said to him, “Do you know that Baalis the king of the children of Ammon has sent Ishmael the son of Nethaniah to take your life?” But Gedaliah the son of Ahikam didn’t believe them.
15 Then Johanan the son of Kareah spoke to Gedaliah in Mizpah secretly, saying, “Please let me go, and I will kill Ishmael the son of Nethaniah, and no man will know it. Why should he take your life, that all the Jews who are gathered to you should be scattered, and the remnant of Judah perish?”
16 But Gedaliah the son of Ahikam said to Johanan the son of Kareah, “You shall not do this thing, for you speak falsely of Ishmael.”