Jeremiah 41:1-3

Now it came to pass in the seventh month that Ishmael the son of Nethaniah, the son of Elishama, of the royal family and of the officers of the king, came with ten men to Gedaliah the son of Ahikam, at Mizpah. And there they ate bread together in Mizpah. Then Ishmael the son of Nethaniah, and the ten men who were with him, arose and struck Gedaliah the son of Ahikam, the son of Shaphan, with the sword, and killed him whom the king of Babylon had made governor over the land. Ishmael also struck down all the Jews who were with him, that is, with Gedaliah at Mizpah, and the Chaldeans who were found there, the men of war.