Charles Ellicott Commentary 2 Chronicles 34:2

"And he did that which was right in the eyes of Jehovah, and walked in the ways of David his father, and turned not aside to the right hand or to the left." — 2 Chronicles 34:2 (ASV)

And declined ... the left. — As in the Book of Kings. Josiah is the only king on whom this encomium is bestowed. It is equivalent to saying that his observance of the law was perfect. Compare Deuteronomy 5:32; Deuteronomy 17:20 (the law of the king); Deuteronomy 28:14.