Matthew Henry Presbyterian @wholebiblehenry

Here is, I. Hezekiah's age when he came to the crown. He was twenty-five years old. Joash, who came to the crown after two bad reigns, was but seven years old; Josiah, who came after two bad reigns, was but eight, which occasioned the delay of the reformation; but Hezekiah had come to years, and so applied himself immediately to it.

Commenting on 2 Chronicles 29:1-11

John Gill Reformed Baptist @doctorgill

My sons,.... So, as the father of his people, he speaks of them in the most tender and affectionate manner: be not now negligent; backward to this good work, slothful, sluggish, and remiss in it; according to Jarchi and Kimchi, the word has the signification of error, and the sense may be, do not continue in the error in which you have been, in neglecting...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Now it is in mine heart to make a covenant with the Lord God--Convinced of the sin and bitter fruits of idolatry, Hezekiah intended to reverse the policy of his father, and to restore, in all its ancient purity and glory, the worship of the true God. His commencement of this resolution at the beginning of his reign attests his sincere piety.