2 Kings 20:9

"Do you wish the shadow to go forward ten lines or to go back ten steps, etc.?" [2 Kings 20:9] What the prophet Isaiah said to King Hezekiah: Do you wish the shadow to go forward ten lines, or to go back ten steps? signifies the same thing by the name of steps as by lines, that is, the division of hours, which we usually mark twelve per day on a sundial; or, as Jerome says, the steps were constructed by mechanical art, so that the shadow descending each one would mark the intervals of the hours. It was then the tenth hour of the day when the prophet spoke to the king: Do you wish, therefore, he said, that the shadow go forward ten lines, the sun proceeding above the earth through northern regions to the east, which it was about to do daily in the usual course: or that the shadow go back ten steps, the face of the sun being turned backward and returning through the southern region to the east? But the king said, It is easy, he said, for the shadow to grow by ten lines; I do not wish this to happen, but that it should go back ten steps. For he saw that it could be a greater miracle if the sun acted contrary to its usual course, than if it proceeded in the usual manner; although much higher, i.e., lifted above the earth to the east, as if flying to the morning of the second day without any intervening night. For indeed those who live in the island of Thule, which is beyond Britain, or in the farthest boundaries of the Scythians, see this happen for several days during the whole summer, because the sun, having set for the rest of the world and placed under the earth, nonetheless appears above the earth to them the whole night; and it is visibly seen how it returns from the western part to the eastern lowly, until it is again given back to the whole world at the common rising, as both the histories of the ancients and the abundant evidence of our men of this age, who come from those parts, testify. However, those who inhabit the innermost parts of the south never see the sun return from the western to the eastern through the meridian regions.