And he walked in the way of Asa his father, and departed not from it, doing that which was right in the sight of the LORD.
We are now drawing towards the close of the history of Jehoshaphat's reign, for a further account of which those who lived when this book was published were referred to an authentic history of it, written by Jehu the prophet (Ch2 19:2), which was then extant, Ch2 20:34.
Commenting on 2 Chronicles 20:31-37
walked in the way of Asa his father, and departed not from it--He was more steadfast and consistently religious (compare Ch2 15:18).
And he walked in the way of Asa his father, and departed not from it, doing [that which was] right in the sight of the LORD. (s) Meaning, in his virtues, and those ways in which he followed God.