Musnad Abu Ya'la al-Mawsili 181:1

Harun ibn Ma'ruf narrated to us, Sufyan narrated to us, from Ziyad ibn 'Alaqah, that he heard his paternal uncle Qutbah say: I heard the Messenger of Allah (may Allah bless him and grant him peace) reciting in the morning prayer: "And tall palm trees, with layered spathes."