Behold, I will bring again the shadow of the degrees, which is gone down in the sun dial of Ahaz, ten degrees backward. So the sun returned ten degrees, by which degrees it was gone down. Which is gone down "By which the sun is gone down" - For בשמש bashshemesh, the Septuagint, Syriac, and Chaldee read השמש, hashshemesh. - Houbigant. In the history of this miracle in the book of Kings, (2 Kings 20:9-11), there is no mention at all made of the sun, but only of the going backward of the shadow: which might be effected by a supernatural refraction. The first ὁ ἡλιος, the sun, in this verse is omitted in the Septuagint, MS. Pachom.
Related Commentaries of Isaiah 38:8
Isaiah 38:8
8 Behold, I will bring again the shadow of the degrees, which is gone down in the sun dialb of Ahaz, ten degrees backward. So the sun returned ten degrees, by which degrees it was gone down.