Adam Clarke's Commentary on the Bible - Isaiah 38:8
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. read more
John Gills Exposition of the Bible Commentary - Isaiah 38:8
Behold, I will bring again the shadow of the degrees ,.... Or lines made on a dial plate, to show the progress of the sun, and what time of day it was. Some think only the shadow was brought back by the power of God, the sun keeping its course as usual; but in the next clause the sun is expressly said to return ten degrees: besides, it is not easy to conceive how the shadow of the sun should go back, unless the sun itself did; if it had been only the shadow of it on Ahaz's dial, it would not... read more