In the seventh month, Ishmael son of Nethaniah, son of Elishama, of the royal family and one of the king's chief officers, came with 10 men to Gedaliah son of Ahikam at Mizpah. They ate a meal together there in Mizpah,
References for Jeremiah 41:1
but then Ishmael son of Nethaniah and the 10 men who were with him got up and struck down Gedaliah son of Ahikam, son of Shaphan, with the sword; he killed the one the king of Babylon had appointed in the land.
Ishmael also struck down all the Judeans who were with Gedaliah at Mizpah, as well as the Chaldean soldiers who were there.
References for Jeremiah 41:3
On the second day after he had killed Gedaliah, when no one knew [yet],
80 men came from Shechem, Shiloh, and Samaria who had shaved their beards, torn their garments, and gashed themselves, and who were carrying grain and incense offerings to bring to the temple of the Lord.
Ishmael son of Nethaniah came out of Mizpah to meet them, weeping as he came. When he encountered them, he said: "Come to Gedaliah son of Ahikam!"
But when they came into the city, Ishmael son of Nethaniah and the men with him slaughtered them and threw them into a cistern.
References for Jeremiah 41:7
However, there were 10 men among them who said to Ishmael, "Don't kill us, for we have hidden treasure in the field-wheat, barley, oil, and honey!" So he stopped and did not kill them along with their companions.
Now the cistern where Ishmael had thrown all the corpses of the men he had struck down was a large one that King Asa had made in the encounter with Baasha king of Israel. Ishmael son of Nethaniah filled [it] with the slain.
References for Jeremiah 41:9