Al Isra’ Ayah 106

وَقُرْءَانًا فَرَقْنَـٰهُ لِتَقْرَأَهُۥ عَلَى ٱلنَّاسِ عَلَىٰ مُكْثٍ وَنَزَّلْنَـٰهُ تَنزِيلاً ١٠٦ ?It is? a Quran We have revealed in stages so that you may recite it to people at a deliberate pace. And We have sent it down in successive revelations.