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  ?