25:45
أَلَمْ تَرَ إِلَىٰ رَبِّكَ كَيْفَ مَدَّ ٱلظِّلَّ وَلَوْ شَآءَ لَجَعَلَهُۥ سَاكِنًا ثُمَّ جَعَلْنَا ٱلشَّمْسَ عَلَيْهِ دَلِيلًا
alam tara ilā rabbika kayfa madda l-ẓila walaw shāa lajaʿalahu sākinan thumma jaʿalnā l-shamsa ʿalayhi dalīlan
Do you not see how your Lord lengthens the shade? If He had willed, He could have made it stand still- We made the sun its indicator-
Have you not seen how your Lord spread the shadow. If He willed, He could have made it still - But We have made the sun its guide (i.e. after the sunrise, the shadow shrinks and vanishes at midnoon and then again appears in the afternoon with the decline of the sun, and had there been no sunlight, there would have been no shadow).