Jeremiah 41:2, 10

Ishmael the son of Nethaniah and the ten men who were with him got up and struck down Gedaliah the son of Ahikam, the son of Shaphan, with the sword and killed the one whom the king of Babylon had appointed [governor] over the land. [2 Kin 25:25]

Then Ishmael took captive all the rest of the people who were in Mizpah—even the king’s daughters (ladies of the court) and all the people who remained in Mizpah, whom Nebuzaradan the captain of the bodyguard had put under the charge of Gedaliah the son of Ahikam. Ishmael the son of Nethaniah took them captive and crossed over [the Jordan] to [meet his allies] the Ammonites.