2 Kings 23:3 records Josiah's covenant to follow the Lord with all heart and soul—the concrete act behind the summary in v25.

2 Kings 18:5 makes a similar superlative claim about Hezekiah's trust in God, paralleling Josiah's unparalleled devotion with a different emphasis.

Deuteronomy 4:29 promises that seeking God with all heart and soul leads to finding him—the language Josiah's devotion echoes.

Deuteronomy 6:5 commands love with all heart, soul, and might—the exact formulation Josiah is said to have fulfilled.

1 Kings 2:4 conditions the Davidic dynasty on walking before God with all heart and soul—Josiah embodies that condition.

1 Kings 8:48 describes repentance with all heart and soul in captivity—Josiah's wholehearted return to God matches this pattern.

Jeremiah 29:13 promises that seeking God with all heart leads to finding him—Josiah's turning exemplifies this promise.

1 Kings 21:25 describes Ahab's unparalleled evil—a direct contrast to Josiah's unparalleled devotion.

Job 1:8 also uses 'no one like him' for Job's blamelessness—paralleling Josiah's unique devotion.

Jeremiah 22:15 praises Josiah for doing what is right and just—reinforcing the description of his wholehearted devotion.

1 Kings 15:5 praises David's faithfulness except for Uriah—Josiah's obedience to the law is a general parallel to David's devotion.

Nehemiah 10:29 records a covenant to obey all God's commandments—a later communal commitment echoing Josiah's individual reform.

Malachi 4:4 calls Israel to remember the law of Moses—Josiah's turning according to that law serves as a model for later generations.