Surah Al-Isra' (The Night Journey), Verse 106

وَقُرْاٰنًا فَرَقْنٰهُ لِتَقْرَاَهٗ عَلَی النَّاسِ عَلٰی مُكْثٍ وَّنَزَّلْنٰهُ تَنْزِیْلًا ۟

Wa quraanan faraqnaahu litaqra ahoo 'alan naasi 'alaa muksinw wa nazzalnaahu tanzeelaa

“(It is) a Qur'an which We have divided (into parts from time to time), in order that thou mightest recite it to men at intervals: We have revealed it by stages.”

Quran 17:106 (Yusuf Ali Translation)