Sahih al-Bukhari 5037
Sahih al-Bukhari · Book 66: Virtues of the Qur'an · Forgetting the Qur'an. And can one say: “I forgot such and such a Verse?
Narrated Aisha:
حَدَّثَنَا رَبِيعُ بْنُ يَحْيَى ، حَدَّثَنَا زَائِدَةُ ، حَدَّثَنَا هِشَامٌ ، عَنْ عُرْوَةَ ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ سَمِعَ النَّبِيُّ صلى الله عليه وسلم رَجُلاً يَقْرَأُ فِي الْمَسْجِدِ فَقَالَ " يَرْحَمُهُ اللَّهُ لَقَدْ أَذْكَرَنِي كَذَا وَكَذَا آيَةً مِنْ سُورَةِ كَذَا " .
The Prophet (ﷺ) heard a man reciting the Qur'an in the mosque and said, "May Allah bestow His Mercy on him, as he has reminded me of such-and-such Verses of such a Surah."