أَلَم تَرَ إِلىٰ رَبِّكَ كَيفَ مَدَّ الظِّلَّ وَلَو شاءَ لَجَعَلَهُ ساكِنًا ثُمَّ جَعَلنَا الشَّمسَ عَلَيهِ دَليلًا

Didn’t you see how your Lord causes the shadow to extend? Had He willed, He could’ve made it still. And We made the sun its indicator.