2 Chronicles 14:2-5 describes Asa's reforms—removing altars and seeking God—which Jehoshaphat emulated by walking in his father's way.

2 Chronicles 17:3-6 expands on Jehoshaphat's early piety, walking in David's ways and removing idols—showing the righteousness mentioned.

2 Chronicles 16:7-12 shows Asa's later failure—relying on Syria and imprisoning the seer—contrasting with Jehoshaphat's consistent righteousness.

1 Kings 15:11 states Asa did right in the LORD's eyes like David, reinforcing the standard Jehoshaphat followed.

Psalm 18:21 echoes the language of keeping God's ways and not departing—a parallel claim of righteousness like Jehoshaphat's.