Jeremiah 41:3
Ishmael also slew all the Jews that were with him, even with Gedaliah at Mizpah and the Chaldean soldiers that were found there.
2 Kings 25:25
But in the seventh month, Ishmael, the son of Nethaniah, the son of Elishama of the royal seed, came and ten men with him and smote Gedaliah, that he died, and the Jews and the Chaldees that were with him at Mizpah.
Ecclesiastes 9:18
Wisdom is better than weapons of war, but one sinner destroys much good.
Jeremiah 41:11-12
But when Johanan the son of Kareah, and all the princes of the armies that were with him, heard of all the evil that Ishmael the son of Nethaniah had done,
Lamentations 1:2
Beth She weeps sore in the night, and her tears are on her cheeks; among all her lovers she has none to comfort her; all her friends have dealt treacherously with her; they are become her enemies.