To go down ten degrees, to wit, in an instant; for that course or motion of the sun is natural for the kind of it, though miraculous for the swiftness of it; but the other would be both ways miraculous.
Related Commentaries of 2 Kings 20:10
2 Kings 20:10
10 And Hezekiah answered, It is a light thing for the shadow to go down ten degrees: nay, but let the shadow return backward ten degrees.