And the covert for the Sabbath - There are a great number of conjectures concerning this covert, or, as it is in the Hebrew, the מוסך musach, of the Sabbath. As the word, and others derived from the same root, signify covering or booths, it is very likely that this means either a sort of canopy which was erected on the Sabbath days for the accommodation of the people who came to worship, and which Ahaz took away to discourage them from that worship; or a canopy under which the king and his family reposed themselves, and which he transported to some other place to accommodate the king of Assyria when he visited him. Jarchi supposes that it was a sort of covert way that the kings of Judah had to the temple, and Ahaz had it removed lest the king of Assyria, going by that way, and seeing the sacred vessels, should covet them. If that way had been open, he might have gone by it into the temple, and have seen the sacred vessels, and so have asked them from a man who was in no condition to refuse them, however unwilling he might be to give them up. The removing of this, whatever it was, whether throne or canopy, or covered way, cut off the communication between the king's house and the temple; and the king of Assyria would not attempt to go into that sacred place by that other passage to which the priests alone had access.

the covert
There are a great number of conjectures concerning this covert; but it is probable that it was either, as Locke supposes, a sort of shelter or canopy erected for the people on the sabbath when the crowd was too great for the porch to contain them; or, as Dr. Geddes supposes, a seat, covered with a canopy, placed on an elevation, for the king and his court, when they attended public worship.

2 Kings 11:5 And he commanded them, saying, This is the thing that you shall do...

1 Kings 10:5 And the meat of his table, and the sitting of his servants, and the attendance of his ministers, and their apparel, and his cupbearers...

Ezekiel 46:2 And the prince shall enter by the way of the porch of that gate without, and shall stand by the post of the gate...

Of the Power of Making Laws. The Cruelty of the Pope and his Adherents, in this Respect, in Tyrannically Oppressing and Destroying Souls.
1. The power of the Church in enacting laws. This made a source of human traditions. Impiety of these traditions. 2. Many of the Papistical traditions not only difficult, but impossible to be observed. 3. That the question may be more conveniently explained, nature of conscience must be defined. 4. Definition of conscience explained. Examples in illustration of the definition. 5. Paul's doctrine of submission to magistrates for conscience sake, gives no countenance to the Popish doctrine of the obligation …
John Calvin—The Institutes of the Christian Religion