Jeremiah 41:3

And Ishmael smote all the Jews that were with him, with Gedaliah, at Mizpah, and the Chaldeans that were found there, the men of war.

2 Kings 25:25

And it came to pass in the seventh month, that 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 Chaldeans that were with him at Mizpah.

Ecclesiastes 9:18

Wisdom is better than weapons of war; but one sinner destroyeth much good.

Jeremiah 41:11-12

And Johanan the son of Kareah, and all the captains of the forces that were with him, heard of all the evil that Ishmael the son of Nethaniah had done;

Lamentations 1:2

She weepeth sore in the night, and her tears are on her cheeks; among all her lovers she hath no comforter; all her friends have dealt treacherously with her, they are become her enemies.

Treasury of Scripture Knowledge

Summary

Ishmael also slew all the Jews that were with him, even with Gedaliah, at Mizpah, and the Chaldeans that were found there, and the men of war.

Bible References

General references

Jeremiah 41:11
And Johanan the son of Kareah, and all the captains of the forces that were with him, heard of all the evil that Ishmael the son of Nethaniah had done;
2 Kings 25:25
And it came to pass in the seventh month, that 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 Chaldeans that were with him at Mizpah.
Ecclesiastes 9:18
Wisdom is better than weapons of war; but one sinner destroyeth much good.
Lamentations 1:2
She weepeth sore in the night, and her tears are on her cheeks; among all her lovers she hath no comforter; all her friends have dealt treacherously with her, they are become her enemies.