Jeremiah 41:7-9

7But when they came into the city, Ishmael son of Nethaniah and the men with him slaughtered them and threw them into a cistern.

8However, there were ten men among them who said to Ishmael, “Don’t kill us, for we have hidden treasure in the field — wheat, barley, oil, and honey!” So he stopped and did not kill them along with their companions.

9Now the cistern where Ishmael had thrown all the corpses of the men he had struck down was a large one that King Asa had made in the encounter with King Baasha of Israel. Ishmael son of Nethaniah filled it with the slain.