Jeremiah 41:9-12

9Now the cistern where Ishmael threw all the dead bodies of those he had killed was a large one that King Asa had constructed as part of his defenses against King Baasha of Israel. Ishmael son of Nethaniah filled it with dead bodies.

10Then Ishmael took captive all the people who were still left alive in Mizpah. This included the royal princesses and all the rest of the people in Mizpah that Nebuzaradan, the captain of the royal guard, had put under the authority of Gedaliah son of Ahikam. Ishmael son of Nethaniah took all these people captive and set out to cross over to the Ammonites.

11Johanan son of Kareah and all the army officers who were with him heard about all the atrocities that Ishmael son of Nethaniah had committed.

12So they took all their troops and went to fight against Ishmael son of Nethaniah. They caught up with him near the large pool at Gibeon.