Jeremiah 41:9-12

9Now the pit wherein Ishmael cast all the dead bodies of the men whom he had slain, by the side of Gedaliah (the same was that which Asa the king had made for fear of Baasha king of Israel), Ishmael the son of Nethaniah filled it with them that were slain. 10Then 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 Nebuzaradan the captain of the guard had committed to Gedaliah the son of Ahikam; Ishmael the son of Nethaniah carried them away captive, and departed to go over to the children of Ammon.

11But when Johanan the son of Kareah, and all the captains of the forces that were with him, heard of all the evil that Ishmael the son of Nethaniah had done, 12then they took all the men, and went to fight with Ishmael the son of Nethaniah, and found him by the great waters that are in Gibeon.