2 Kings 25:25
But it happened in the seventh month that Ishmael the son of Nethaniah the son of Elishama from the offspring of the kingship came, and ten men with him, and they struck down Gedaliah so that he died with the Judeans and with the Chaldeans who were with him at Mizpah.
2 Kings 11:1
Now Athaliah the mother of Ahaziah saw that her son was dead, so she prepared to destroy all of the offspring of the royal family.
Jeremiah 40:15-15
Then Johanan the son of Kareah said to Gedaliah in secrecy at Mizpah, {saying}, "Please let me go and kill Ishmael the son of Nethaniah, and {nobody} will know. Why should he kill you, so that all of Judah who are gathered to you will be scattered, and the remnant of Judah will perish?"
Zechariah 7:5
"Say to all the people of the land and to the priests: 'When you fasted and lamented in the fifth and seventh months for these seventy years, did you really fast for me?
Zechariah 8:19
"Thus says Yahweh of hosts: 'The fast of the fourth [month], the fifth [month], the seventh [month], and the tenth [month] will be for the house of Judah jubilation and joy and merry festivals; therefore love truth and peace.'