Charles Ellicott Commentary 2 Chronicles 34:14-19

"And when they brought out the money that was brought into the house of Jehovah, Hilkiah the priest found the book of the law of Jehovah [given] by Moses. And Hilkiah answered and said to Shaphan the scribe, I have found the book of the law in the house of Jehovah. And Hilkiah delivered the book to Shaphan. And Shaphan carried the book to the king, and moreover brought back word to the king, saying, All that was committed to thy servants, they are doing. And they have emptied out the money that was found in the house of Jehovah, and have delivered it into the hand of the overseers, and into the hand of the workmen. And Shaphan the scribe told the king, saying, Hilkiah the priest hath delivered me a book. And Shaphan read therein before the king. And it came to pass, when the king had heard the words of the law, that he rent his clothes." — 2 Chronicles 34:14-19 (ASV)

Hilkiah finds the Book of the Law, and delivers it to Shaphan, who reads it before the king. (Compare to 2 Kings 22:8–11.)