Jeremiah 41:3
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.
Cross-reference
Jeremiah 41:11
Parallel
Jer 41:11 records Johanan's reaction upon hearing of the killings described here — a direct narrative link.
Jeremiah 41:12
Parallel
Jer 41:12 describes Johanan's military response to the massacre — the immediate sequel to this verse.
2 Kings 25:25
Parallel
2 Kings 25:25 parallels this account of Ishmael killing Gedaliah and those with him — a separate historical record of the same event.