Albert Barnes Commentary 2 Chronicles 26:5

"And he set himself to seek God in the days of Zechariah, who had understanding in the vision of God: and as long as he sought Jehovah, God made him to prosper." — 2 Chronicles 26:5 (ASV)

Who had understanding in the visions of God—Another reading, supported by the Septuagint and some ancient versions, is: “who instructed him in the fear of God.”