Abdullah bin Abbas reported,

Whenever the Quran was being revealed to the Prophet ﷺ, he would hasten to recite it in order to memorize it. So Allah عز وجل revealed "Do not move your tongue with it" up to His words "its collection and its recitation are upon Us" [Qiyamah 75:16–17].

Azami 13646

Sahih

عن ابن عباس قال

كان النبي ﷺ إذا نزل القرآن عليه يعجل بقراءته ليحفظه، فأنزل الله عز وجل {لا تحرك به لسانك} إلى قوله {وقره أنه}

الأعظمي 13646صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Tafsir of Surah Qiyamah
Section
His saying, "Do not move your tongue with it to hasten it. Indeed, upon Us is its collection and its recitation. So when We have recited it, follow its recitation. Then upon Us is its clarification."
Numbering
Jami al-Kamil 13646 (2nd edition)
Azami 13646