Isa 38:7

“(Verses 7-8) And this shall be a sign to you from the Lord, that the Lord will do this word that he has spoken: Behold, I will turn back the shadow of the steps by which it has gone down on the sun dial of Ahaz ten steps backwards: and the sun returned ten steps by the same steps that it had gone down. And Hezekiah said to Isaiah: What will be the sign that the Lord will heal me? To whom did the prophet respond: This will be the sign from the Lord that the Lord will do the word he has spoken: Do you want the shadow to approach by so many lines, or do you want it to go back the same number of steps? To whom Hezekiah said: It is easy for the shadow to advance ten lines, but I do not want it to happen; rather, I want it to go back ten steps. And when Isaiah invoked the power of the Lord, the sign was fulfilled. However, a sign is given that the sun turns back by ten degrees, which we turn according to Symmachus into lines and a sundial, which understood the degrees in the lines in order to make a clearer sense to those reading. Whether the steps were constructed with mechanical skill, so that as the shadow descended, it would mark the hours. This sign was a type of both the present time and the future, so that just as the sun would return to the beginning of its course, so would Hezekiah's life return to the disclosed years; and for us who live in the week and the octave, through the resurrection of Christ, the spaces of life are extended. The holy places in this province are accustomed to show within the enclosed Temple the steps of the house of Hezekiah, or of Ahaz, which the sun descended through them. But I will never believe, not to mention Ahaz, who was a wicked king; but of any righteous king, that their house was in the Temple of God: since it is said that Solomon, among other things, offended God because he built on a high place, from where he used to look down on the courtyard of the Temple while walking in the tower of the palace (3 Kings 9).”