Memorizing Quran?

Memorizing Quran? Don't hasten in recitation, while being recited. On Allah is its collection and recitation

أعوذ بالله من الشيطان الرجيم 

Al-Qiyamah 75:16

لَا تُحَرِّكْ بِهِۦ لِسَانَكَ لِتَعْجَلَ بِهِۦٓ 

Move not your tongue with it, [O Muhammad], to hasten with recitation of the Qur'an.

Al-Qiyamah 75:17

إِنَّ عَلَيْنَا جَمْعَهُۥ وَقُرْءَانَهُۥ 

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

Al-Qiyamah 75:18

فَإِذَا قَرَأْنَٰهُ فَٱتَّبِعْ قُرْءَانَهُۥ 

So when We have recited it [through Gabriel], then follow its recitation.