From Sahih Muslim (Hadith 1026):
Ziyad b. 'Ilaqa reported it on the authority of his uncle that he said the morning prayer with the Messenger of Allah (ﷺ) and he recited in the first rak'ah:"And the tall palm trees having flower spikes piled one above another (l. 10) or perhaps Surah Qaf
Reference: Muslim 1026