Jeremiah 41:7-9

7Yet it was that as soon as they came within of the city that Ishmael son of Nethaniah and the men with him slaughtered them within the cistern-pit.

8However ten men were found among them that said to Ishmael: “Don’t kill us! For we have hidden stores in the field—wheat, barley, oil and honey!” So he held off and did not kill them along with their companions.

9Now the cistern where Ishmael cast all the corpses of the men whom he killed, because they were on Gedaliah’s side, was the one which King Asa had made for fear of King Baasa of Israel. Ishmael son of Nethaniah filled it with the slain.