Musnad Ahmad 28:276

Hassan ibn Musa narrated to us, Hammad ibn Salamah narrated to us, from Thabit al-Bunani, from Abu Ayyub al-Azdi, and from Nawf al-Azdi, from Abdullah ibn Amr ibn al-As, from the Prophet, peace and blessings of Allah be upon him, the like of it, and he added in it: "And he was about to uncover his garment from his knees, and he was panting for breath."