Jeremiah 40:8

40:8 So all these officers and their troops came to Gedaliah at Mizpah. The officers who came were Ishmael son of Nethaniah, Johanan and Jonathan the sons of Kareah, Seraiah son of Tanhumeth, the sons of Ephai the Netophathite, and Jezaniah son of the Maacathite.

Jeremiah 40:14-15

40:14 They said to him, “Are you at all aware that King Baalis of Ammon has sent Ishmael son of Nethaniah to kill you?” But Gedaliah son of Ahikam would not believe them. 40:15 Then Johanan son of Kareah spoke privately to Gedaliah there at Mizpah, “Let me go and kill Ishmael the son of Nethaniah before anyone knows about it. Otherwise he will kill you and all the Judeans who have rallied around you will be scattered. Then what remains of Judah will disappear.”

Jeremiah 41:1-2

41:1 But in the seventh month Ishmael, the son of Nethaniah and grandson of Elishama who was a member of the royal family and had been one of Zedekiah’s chief officers, came with ten of his men to Gedaliah son of Ahikam at Mizpah. While they were eating a meal together with him there at Mizpah, 41:2 Ishmael son of Nethaniah and the ten men who were with him stood up, pulled out their swords, and killed Gedaliah, the son of Ahikam and grandson of Shaphan. Thus Ishmael killed the man that the king of Babylon had appointed to govern the country.

Jeremiah 41:6

41:6 Ishmael son of Nethaniah went out from Mizpah to meet them. He was pretending to cry as he walked along. When he met them, he said to them, “Come with me to meet Gedaliah son of Ahikam.”

Jeremiah 41:9

41:9 Now the cistern where Ishmael threw all the dead bodies of those he had killed was a large one that King Asa had constructed as part of his defenses against King Baasha of Israel. Ishmael son of Nethaniah filled it with dead bodies.

Jeremiah 41:18

41:18 They were afraid of what the Babylonians might do because Ishmael son of Nethaniah had killed Gedaliah son of Ahikam, whom the king of Babylon had appointed to govern the country.