Surah Al-Qiyamah 75:17

إِنَّ عَلَيْنَا جَمْعَهُۥ وَقُرْءَانَهُۥ

Indeed, upon Us is its collection [in your heart] and [to make possible] its recitation.

Translation: Saheeh International

Tafsir

Assuredly it is for Us to bring it together in your breast and to recite it your reciting of it that is its flowing off your tongue.

Excerpt from Tafsir al-Jalalayn, commentary on 75:17, via Quran.com. The reader has the full commentary and 9 more tafsirs.