replied, the advance of the shadow would not be a sure sign to him, but only its going back.
Verse 11
Isaiah then prayed to the Lord, and the Lord “turned back the shadow (caused it to go back) upon the sun-dial, where it had gone down, on the sundial of Ahaz, ten degrees backward.” אחז מעלות cannot be understood, as it has been by the lxx, Joseph., Syr., as referring to a flight of steps at the palace of Ahaz, which was so arranged that the shadow of an object standing near indicated the hours, but is no doubt a gnomon, a sun-dial which Ahaz may have received from Babylonia, where sun-dials were discovered (Herod. ii. 109). Nothing further can be inferred from the words with regard to its construction, since the ancients had different kinds of sun-dials (cf. Martini Abhandlung von den Sonnenuhren der Alten, Lpz. 1777). The word מעלות steps in the literal sense, is transferred to the scala, which the shadow had to traverse both up and down upon the disk of the sun-dial, and is used both to denote the separate degrees of this scala, and also for the sum-total of these scala, i.e., for the sun-dial itself, without there being any necessity to assume that it was an obelisk-like pillar erected upon an elevated place with steps running round it (Knobel), or a long portable scale of twice ten steps with a gnomon (Gumpach, Alttestl. Studien, pp. 181ff.). All that follows from the descent of the shadow is that the dial of the gnomon was placed in a vertical direction; and the fact that the shadow went ten degrees down or backward, simply presupposes that the gnomon had at least twenty degrees, and therefore that the degrees indicated smaller portions of time than hours. If, then, it is stated in 2Ki 20:8 of Isaiah that the sun went back ten degrees, whereas the going back of the shadow had been previously mentioned in agreement with our text, it is self-evident that the sun stands for the shining of the sun which was visible upon the dial-plate, and which made the shadow recede. We are not, of course, to suppose that the sun in the sky and the shadow on the sun-dial went back at the same time, as Knobel assumes. So far as the miracle is concerned, the words of the text do not require that we should assume that the sun receded, or the rotation of the earth was reversed, as Eph. Syr. and others supposed, but simply affirm that there was a miraculous movement backward of the shadow upon the dial, which might be accounted for from a miraculous refraction of the rays of the sun, effected by God at the
