2 Kings 20:8 in the King James Version
And Hezekiah said unto Isaiah, What shall be the sign that the LORD will heal me, and that I shall go up into the house of the LORD the third day?
Context
7 Isaiah said, “Take a cake of figs.” They took and laid it on the boil, and he recovered.
8 Hezekiah said to Isaiah, “What will be the sign that the LORD will heal me, and that I will go up to the LORD’s house the third day?”
9 Isaiah said, “This will be the sign to you from the LORD, that the LORD will do the thing that he has spoken: should the shadow go forward ten steps, or go back ten steps?”