2 Kings 20:5
5. Thus saith . . . the God of David thy father—An immediate answer was given to his prayer, containing an assurance that the Lord was mindful of His promise to David and would accomplish it in Hezekiah's experience, both by the prolongation of his life, and his deliverance from the Assyrians.
on the third day—The perfect recovery from a dangerous sickness, within so short a time, shows the miraculous character of the cure (see his thanksgiving song, Isa 38:9). The disease cannot be ascertained; but the text gives no hint that the plague was raging then in Jerusalem; and although Arab physicians apply a cataplasm of figs to plague-boils, they also do so in other cases, as figs are considered useful in ripening and soothing inflammatory ulcers.2Ki 20:8-20. THE SUN GOES TEN DEGREES BACKWARD.
2 Kings 20:8
8-11. Hezekiah said unto Isaiah, What will be the sign that the Lord shall heal me—His recovery in the course of nature was so unlooked for, that the king asked for some token to justify his reliance on the truth of the prophet's communication; and the sign he specified was granted to him. The shadow of the sun went back upon the dial of Ahaz the ten degrees it had gone down. Various conjectures have been formed as to this dial. The word in the original is "degrees," or "steps," and hence many commentators have supposed that it was a stair, so artfully contrived, that the shadows on the steps indicated the hours and course of the sun. But it is more probable that it was a proper instrument, and, from the Hebrews having no term to designate it, that it was one of the foreign novelties imported from Babylon by Ahaz. It seems to have been of such magnitude, and so placed in the court, that Isaiah could point to it, and the king see it, from his chamber. The retrogression of the sun's shadow on the dial was miraculously accomplished by the omnipotent power of God; but the phenomenon was temporary, local, confined to the notice, and intended for the satisfaction, only of Hezekiah and his court.