Jeremiah 41:7

41:7 But as soon as they were inside the city, Ishmael son of Nethaniah and the men who were with him slaughtered them and threw their bodies in a cistern.

Jeremiah 41:9

41:9 Now 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.