Volume 7 · Book 61 · Hadith 556
Narrated Aisha: The Prophet 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."
— Sahih Bukhari, Volume 7, Book 61: Virtues of the Qur'an, Hadith #556