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bukhari:4927al-Ḥumaydī > Sufyān > Mūsá

The Prophet ﷺ used to move his tongue when the divine Inspiration was being revealed to him. (Sufyan, a subnarrator, demonstrated (how the Prophet ﷺ used to move his lips) and added. "In order to memorize it." So Allah revealed: "Move not your tongue concerning (the Qur'an) to make haste therewith." (75.16)  

البخاري:٤٩٢٧حَدَّثَنَا الْحُمَيْدِيُّ حَدَّثَنَا سُفْيَانُ حَدَّثَنَا مُوسَى بْنُ أَبِي عَائِشَةَ وَكَانَ ثِقَةً عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ ؓ قَالَ

كَانَ النَّبِيُّ ﷺ إِذَا نَزَلَ عَلَيْهِ الْوَحْىُ حَرَّكَ بِهِ لِسَانَهُ وَوَصَفَ سُفْيَانُ يُرِيدُ أَنْ يَحْفَظَهُ فَأَنْزَلَ اللَّهُ {لاَ تُحَرِّكْ بِهِ لِسَانَكَ لِتَعْجَلَ بِهِ}  


See similar narrations below:

Collected by Tirmidhī
tirmidhi:3329Ibn Abū ʿUmar > Sufyān b. ʿUyaynah > Mūsá b. Abū ʿĀʾishah > Saʿīd b. Jubayr > Ibn ʿAbbās

“When the Quran was being revealed to the Messenger of Allah, he would move his tongue in attempt to memorize it. So Allah, Blessed is He and Most High, revealed: Move not your tongue concerning it to make haste therewith.” He said: “So he would move his two lips.” And Sufyan (a sub-narrator) would move his two lips.  

الترمذي:٣٣٢٩حَدَّثَنَا ابْنُ أَبِي عُمَرَ حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ عَنْ مُوسَى بْنِ أَبِي عَائِشَةَ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا أُنْزِلَ عَلَيْهِ الْقُرْآنُ يُحَرِّكُ بِهِ لِسَانَهُ يُرِيدُ أَنْ يَحْفَظَهُ فَأَنْزَلَ اللَّهُ ( لا تُحَرِّكْ بِهِ لِسَانَكَ لِتَعْجَلَ بِهِ ) قَالَ فَكَانَ يُحَرِّكُ بِهِ شَفَتَيْهِ وَحَرَّكَ سُفْيَانُ شَفَتَيْهِ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ قَالَ عَلِيٌّ قَالَ يَحْيَى بْنُ سَعِيدٍ أَثْنَى سُفْيَانُ الثَّوْرِيُّ عَلَى مُوسَى بْنِ أَبِي عَائِشَةَ خَيْرًا