Jeremiah 41:9
Now the pit wherein Ishmael had cast all the dead bodies of the men, whom he had slain because of Gedaliah, was it which Asa the king had made for fear of Baasha king of Israel: and Ishmael the son of Nethaniah filled it with them that were slain.
Jeremiah 41:9 belongs to the account of events after the fall of Jerusalem, in the period following Zedekiah's reign. In chronological order its chapter comes after Jeremiah 40. It is part of the account at Mizpah of the murder of Gedaliah, the Jewish viceroy left by Nebuchadnezzar, king of Babylon, after the destruction of Jerusalem.
It concerns the dispersion of the remnant of the Jews left and gathered together in Judah after the nation had been carried to Babylon. That dispersion was the work of the king of Ammon. It stands as the third of the four scatterings of Judah, Israel, and Jerusalem signified by the four horns seen by Zechariah. The assassination and related events are commemorated by the seventh-month fast, the Fast of Gedaliah on Tisri 3. That fast is one of the four fasts commemorating events connected with the fall of Jerusalem.