Jeremiah 41:5-9

that eighty men came from Shechem, from Shiloh, and from Samaria with their beards shaved off, their clothes torn, and their bodies gashed, having grain offerings and incense in their hands to bring to the house of the Lord.

Then Ishmael the son of Nethaniah left Mizpah to meet them, weeping as he went; and as he met them, he said to them, “Come to Gedaliah the son of Ahikam!”

Yet it turned out that as soon as they came inside the city, Ishmael the son of Nethaniah and the men who were with him slaughtered them and threw them into the cistern.

But ten men who were found among them said to Ishmael, “Do not put us to death, for we have supplies of wheat, barley, oil, and honey hidden in the field.” So he refrained and did not put them to death along with their companions.

Now as for the cistern where Ishmael had thrown all the bodies of the men whom he had struck and killed because of Gedaliah, it was the one that King Asa had constructed on account of Baasha, king of Israel; Ishmael the son of Nethaniah filled it with the dead.