Sayyiduna Qutbah bin Malik (may Allah be pleased with him) said: I prayed the morning prayer behind the Messenger of Allah (peace and blessings be upon him). He (peace and blessings be upon him) recited (Surah) "Qaf. By the glorious Qur'an" until he reached "And the tall palm trees with their clusters of fruit arranged in layers" [Surah Qaf: 10]. I kept repeating it, and I did not know what he (peace and blessings be upon him) recited after that.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16084