Jeremiah 41:8-9

8But ten of the men among them said to Ishmael, “Do not kill us, for we have hidden treasure in the field—wheat, barley, oil, and honey!” So he refrained from killing them with the others.

9Now the cistern into which Ishmael had thrown all the bodies of the men he had struck down along with Gedaliah was a large one that King Asa had made for fear of Baasha king of Israel. Ishmael son of Nethaniah filled it with the slain.