Thematic Bible: Shadow on ahaz' sun-dial

Now Hezekiah had asked Isaiah, "What is to be the sign that the LORD is healing me and that I'll be going up to the LORD's Temple three days from now?" So Isaiah replied, "This will be your sign from the LORD that the LORD will do what he has promised. Shall the shadow go forward ten steps or go back ten steps?" Hezekiah answered, "It's an easy thing for a shadow to lengthen ten steps. So let the shadow go backward ten steps." read more.
So Isaiah cried out to the LORD, who brought the shadow back ten steps after it had gone down the stairway of Ahaz.

This is the LORD's sign to you that the LORD will carry out this thing he has promised: Watch! I will make the shadow on the steps of the upper dial of Ahaz that marks the sun go ten steps backwards."'" Then the sunlight turned back on the dial the ten steps by which it had gone down.