Jeremiah 41:2, 10

Then arose Ishmael the son of Nethaniah, and the ten men that were with him, and smote Gedaliah the son of Ahikam the son of Shaphan with the sword, and slew him, whom the king of Babylon had made governor over the land.

Then Ishmael carried away captive all the residue of the people that were in Mizpah, even the king's daughters, and all the people that remained in Mizpah, whom Nebuzar-adan the captain of the guard had committed to Gedaliah the son of Ahikam: and Ishmael the son of Nethaniah carried them away captive, and departed to go over to the Ammonites.