'Reigning' in the Bible

For thus said Jehovah concerning Shallum son of Josiah king of Judah, who is reigning instead of Josiah his father, who hath gone forth from this place: He doth not turn back hither again;

then also My covenant with My servant David may be broken so that he will not have a son reigning on his throne, and the Levitical priests will not be My ministers.

A son of twenty and one years is Zedekiah in his reigning, and eleven years he hath reigned in Jerusalem, and the name of his mother is Hamutal daughter of Jeremiah of Libnah.