Musnad Ahmad 490:6

'Abdullah narrated to us, Muhammad ibn Bakkar—who is Ibn al-Rayyan—narrated to us, Qays ibn al-Rabi' al-Asadi narrated to us, from Iyad ibn Laqit, from Abu Rimthah, who said: "I went out with my father while I was a young boy, and we came to a man in the midday heat, sitting in the shade of a house, wearing two green garments. His hair was abundant (wufrah), and upon his head was a trace of henna." He said: My father said to me, "Do you know who this is?" I said, "No." He said, "This is the Messenger of Allah, may Allah bless him and grant him peace." Then he mentioned the rest of the hadith.