Jeremiah 41:8-9

8But there were ten men among them who said to Ishmael, “Do not kill us. For we will give you the stores of wheat, barley, olive oil, and honey we have hidden in a field. So he spared their lives and did not kill them along with the rest.

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.