Jeremiah 41:7-9

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

8But there were ten men among them who said to Ishmael, "Do not put us to death, for we have stores of wheat, barley, oil, and honey hidden in the fields." So he refrained and did not put them to death with their companions.

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