C. F. Keil and Franz Delitzsch on 2 Kings 23:1-2

2Ki 23:1-2 Reading of the law in the temple, and renewal of the covenant (cf. 2Ch 34:29-32). Beside the priests, Josiah also gathered together the prophets, including perhaps Jeremiah and Zedekiah, that he might carry out the solemn conclusion of the covenant with their co-operation, and, as is evident from Jer 1-11, that they might then undertake the task, by their impressive preaching in Jerusalem and the cities of Judah, of making the people conscious of the earnestness of the covenant duties which they had so recently undertaken (see Oehler in Herzog’s Cycl.). Instead of the prophets, the Levites are mentioned in the Chronicles, probably only because the Levites are mentioned along with the priests in other cases of a similar kind. ויּקרא, he read, i.e., had it read; for the duty of reading the law in the temple devolved upon the priests as the keepers of the law (Deu 31:9.).