It is narrated from Qutbah bin Malik (may Allah be pleased with him): I prayed, and the Messenger of Allah (peace and blessings be upon him) led us in the morning prayer, and he recited Surah Qaf in it. When he (peace and blessings be upon him) recited: "And the tall date palms, having fruit arranged in layers" [Surah Qaf: 10], I began repeating it, and I do not know what he said.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4011