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."
Sahih al-Bukhari Book 66, Hadith 60
← Previous Hadith Ibn `Abbas said, "I have learnt all the Muhkam Suras during the life time of Allah's Messenger (ﷺ)." I said to him, 'What is meant by the Muhkam?" He replied, "The Mufassal."

Sahih al-Bukhari Book 66, Hadith 59 Next Hadith → (The same Hadith as 6.556, adding): which I missed (modifying the Verses).

Sahih al-Bukhari Book 66, Hadith 61