Adam Clarke on 2 Chronicles 35:3

Put the holy ark in the house - It is likely that the priests had secured this when they found that the idolatrous kings were determined to destroy every thing that might lead the people to the worship of the true God. And now, as all appears to be well established, the ark is ordered to be put into its own place.

For an ample account of this passover and the reformation that was then made, see on 2Kgs 23:1 (note), etc., and the places marked in the margin.