2 Kings 25:22-25

22Now over the people whom Nebuchadnezzar king of Babylon had left in the land of Judah, he appointed [as governor] Gedaliah the son of Ahikam, the son of Shaphan.

23When all the captains of the forces, they and their men, heard that the king of Babylon had appointed Gedaliah governor, they came with their men to Gedaliah at Mizpah, namely, Ishmael the son of Nethaniah, and Johanan the son of Kareah, and Seraiah the son of Tanhumeth the Netophathite, and Jaazaniah the son of the Maacathite.

24Gedaliah swore [an oath] to them and their men, and said to them, “Do not be afraid of the servants (officials) of the Chaldeans. Live in the land and serve the king of Babylon, and it will be well with you.”

25But in the seventh month Ishmael the son of Nethaniah, the son of Elishama, of the royal family [who had a claim to be governor], came with ten men and struck and killed Gedaliah and the Jews and the Chaldeans who were with him at Mizpah.