وَقُرۡاٰنًا فَرَقۡنٰهُ لِتَقۡرَاَهٗ عَلَي النَّاسِ عَلٰي مُكۡثٍ وَّنَزَّلۡنٰهُ تَنۡزِيۡلًا

And [it is] a Qur'an which We have separated [by intervals] that you might recite it to the people over a prolonged period. And We have sent it down progressively