Unknown Author
2 Kings 23:2BSB·author unknown

And he went up to the house of the LORD with all the people of Judah and Jerusalem, as well as the priests and the prophets—all the people small and great—and in their hearing he read all the words of the Book of the Covenant that had been found in the house of the LORD.

Matthew Henry Presbyterian @wholebiblehenry

Josiah had received a message from God that there was no preventing the ruin of Jerusalem, but that he should deliver only his own soul; yet he did not therefore sit down in despair, and resolve to do nothing for his country because he could not do all he would. No, he would do his duty, and then leave the event to God.

Commenting on 2 Kings 23:1-3

John Gill Reformed Baptist @doctorgill

And the king stood by a pillar,.... As the manner of kings was, Kg2 11:14 and is thought to be the brasen scaffold erected by Solomon, on which he stood at the dedication of the temple, and now Josiah at the reading of the law, Ch2 6:13, it is said to be his place, Ch2 34:31; see Gill on Kg2 11:14.

Jamieson-Fausset-Brown Reformed @jfbcommentary

he read in their ears--that is, "caused to be read."