Musnad Ahmad 32:1819

Sulayman ibn Harb narrated to us, Hammad ibn Salamah narrated to us, from Habib ibn al-Shahid, from al-Hasan, from Anas ibn Malik, who said: "The Messenger of Allah (ﷺ) went out leaning upon Usamah ibn Zayd, wrapped in a Qatari garment," or he said, "draped in it, and he led them in prayer."