2 Chronicles 25:1-3

Amaziah was twenty-five years old when he became king, and he reigned for twenty-nine years in Jerusalem. And his mother’s name was Jehoaddan of Jerusalem.

He did what was right in the sight of the Lord, only not wholeheartedly.

Now it came about, as soon as the kingdom was firmly in his grasp, that he killed his servants who had killed his father the king.