Musnad Abu Ya'la al-Mawsili 118:13

Abu Khaythama narrated to us, Ibn 'Uyaynah narrated to us, from al-Zuhri, from Anas ibn Malik, who said: The last look I took at the Messenger of Allah (may Allah bless him and grant him peace) was on Monday. He drew back the curtain while the people were behind Abu Bakr, so I looked at his face, and it was as if it were a page of a Mushaf (copy of the Quran). The people wanted to move, but he signaled to them to remain. Then he let the curtain fall, and he passed away at the end of that day.