Jeremiah 36:9

36:9 All the people living in Jerusalem and all the people who came into Jerusalem from the towns of Judah came to observe a fast before the Lord. The fast took place in the ninth month of the fifth year that Jehoiakim son of Josiah was ruling over Judah.

Jeremiah 52:4

52:4 King Nebuchadnezzar of Babylon came against Jerusalem with his whole army and set up camp outside it. They built siege ramps all around it. He arrived on the tenth day of the tenth month in the ninth year that Zedekiah ruled over Judah.