Ibn Abbas commented on the verse "Do not move your tongue with it" [Qiyamah 75:16]. He said that whenever Jibreel came down to the Prophet ﷺ with revelation, he would move his tongue and lips along with it, and this bore heavily upon him, so that it could be noticed in him. Then Allah Almighty revealed "Do not move your tongue with it to hasten it" [Qiyamah 75:16], meaning to hasten in taking hold of it."Indeed, upon Us is its collection and its recitation" [Qiyamah 75:17], meaning it is upon Us to gather it in your breast, and its recitation, so that you may recite it."So when We have recited it, then follow its recitation" [Qiyamah 75:18]. He said this means, when We have sent it down, listen to it."Indeed, upon Us is its clarification" [Qiyamah 75:19], meaning that We shall make it clear by your tongue.So after that, whenever Jibreel came to him, he would lower his head and listen in silence, and once Jibreel departed, he would recite it just as Allah had promised him.
و حدثنا قتيبة بن سعيد وأبو بكر بن أبي شيبة وإسحق بن إبراهيم كلهم عن جرير قال أبو بكر حدثنا جرير بن عبد الحميد عن موسى بن أبي عائشة
عن ابن عباس في قوله عز وجل {لا تحرك به لسانك} قال كان النبي ﷺ إذا نزل عليه جبريل بالوحي كان مما يحرك به لسانه وشفتيه فيشتد عليه فكان ذلك يعرف منه فأنزل الله تعالى {لا تحرك به لسانك لتعجل به} أخذه {إن علينا جمعه وقرآنه} إن علينا أن نجمعه في صدرك وقرآنه فتقرؤه {فإذا قرأناه فاتبع قرآنه} قال أنزلناه فاستمع له {إن علينا بيانه} أن نبينه بلسانك فكان إذا أتاه جبريل أطرق فإذا ذهب قرأه كما وعده الله