25:45
أَلَمْ تَرَ إِلَىٰ رَبِّكَ كَيْفَ مَدَّ ٱلظِّلَّ وَلَوْ شَآءَ لَجَعَلَهُۥ سَاكِنًۭا ثُمَّ جَعَلْنَا ٱلشَّمْسَ عَلَيْهِ دَلِيلًۭا
Have you not considered your Lord - how He extends the shadow, and if He willed, He could have made it stationary? Then We made the sun for it an indication.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Evidence of the existence of the Creator and the extent of His Power
Here Allah begins explaining the evidence for His existence and His perfect power to create various things and pairs of opposites. Allah says:
أَلَمْ تَرَ إِلَى رَبِّكَ كَيْفَ مَدَّ الظِّلَّ
(Have you not seen how your Lord spread the shadow.) Ibn `Abbas, Ibn `Umar, Abu Al-`Aliyah, Abu Malik, Masruq, Mujahid, Sa`id bin Jubayr, An-Nakha`i, Ad-Dahhak, Al-Hasan, Qatadah, As-Suddi and others said, "This refers to the period from the beginning of the dawn until the sun rises."
وَلَوْ شَآءَ لَجَعَلَهُ سَاكِناً
(If He willed, He could have made it still) meaning, immobile, never changing. This is like the Ayat: