9 And Esaias said, This [is] the sign from the Lord, that the Lord will perform the word which he has spoken, the shadow [of the dial] shall advance ten degrees: [or] if it should go back ten degrees [this would also be the sign].
2 Kings 20:9 Cross References - LXX2012
Isaiah 38:7-8
7 And this [shall be] a sign to you from the Lord, that God will do this thing;
8 behold, I will turn back the shadow of the degrees [of the dial] by which ten degrees on the house of your father the sun has gone down—I will turn back the sun the ten degrees; so the sun went back the ten degrees by which the shadow had gone down.