Charles Ellicott Commentary 2 Kings 15:3

"And he did that which was right in the eyes of Jehovah, according to all that his father Amaziah had done." — 2 Kings 15:3 (ASV)

And he did that which was right. —This statement is repeated word for word in Chronicles. Its exact meaning here, as in other instances, is that Azariah supported legitimate worship and gave no approval to any foreign cultus. When the chronicler adds that sought God in the days of (the prophet) Zachariah, and that as long as he sought Jehovah, God made him to prosper, he does not contradict the preceding general estimate of the king’s religious policy, but simply gives additional information respecting his life and fortunes.