Surah Al-Furqan, Verse 45

أَلَمۡ تَرَ إِلَىٰ رَبِّكَ كَيۡفَ مَدَّ ٱلظِّلَّ وَلَوۡ شَآءَ لَجَعَلَهُۥ سَاكِنٗا ثُمَّ جَعَلۡنَا ٱلشَّمۡسَ عَلَيۡهِ دَلِيلٗا٤٥

alam tara ilā rabbika kayfa madda l-ẓila walaw shāa lajaʿalahu sākinan thumma jaʿalnā l-shamsa ʿalayhi dalīlan

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.