Jeremiah 41:4-15

Now it happened on the second day after the killing of Gedaliah, before anyone knew about it, that eighty men came from Shechem, from Shiloh, and from Samaria with their beards shaved off and their clothes torn and their bodies cut, carrying in their hands grain offerings and incense to present at the [site of the] house of the LORD [in Jerusalem]. Then Ishmael the son of Nethaniah went out from Mizpah to meet them, weeping [false tears] as he went. As he met them, he said to them, “Come to Gedaliah the son of Ahikam!” Yet when they came into the city, Ishmael the son of Nethaniah and the men who were with him slaughtered them and threw them into the cistern (underground water reservoir). But ten men who were among them said to Ishmael, “Do not kill us! We have stores of wheat and barley and oil and honey hidden in the field.” So he stopped and did not kill them along with their companions. Now the cistern into which Ishmael had thrown all the corpses of the men whom he had killed along with Gedaliah was the one which King Asa [of Judah] had made [about three hundred years earlier] on account of King Baasha of Israel [believing that Baasha would lay siege to Mizpah]. Ishmael the son of Nethaniah filled it with [the bodies of] those who were killed. Then Ishmael took captive all the rest of the people who were in Mizpah—even the king’s daughters (ladies of the court) and all the people who remained in Mizpah, whom Nebuzaradan the captain of the bodyguard had put under the charge of Gedaliah the son of Ahikam. Ishmael the son of Nethaniah took them captive and crossed over [the Jordan] to [meet his allies] the Ammonites. But when Johanan the son of Kareah and all the commanders of the forces that were with him heard of the murderous behavior of Ishmael the son of Nethaniah, they took all their men and went to fight with Ishmael the son of Nethaniah and found him by the great pool in Gibeon. Now when all the [captive] people who were with Ishmael saw Johanan the son of Kareah and all the commanders of the forces that were with him, they were glad. So all the people whom Ishmael had taken captive from Mizpah turned around and came back, and joined Johanan the son of Kareah. But Ishmael the son of Nethaniah escaped from Johanan with eight men and went to join the Ammonites.