Musnad Abu Ya'la al-Mawsili 110:114

Ibrahim ibn al-Hajjaj narrated to us, Sakin narrated to us, my father narrated to us, from Ibn Abbas, who said: Al-Fadl ibn Abbas was the rider behind the Prophet, may Allah bless him and grant him peace, from Arafat. The young man began to observe the women and look at them, and the Prophet, may Allah bless him and grant him peace, began to turn his face away with his hand from behind him. The young man continued to observe them, so the Prophet, may Allah bless him and grant him peace, said to him: "O son of my brother, this is a day in which whoever controls his hearing, his sight, and his tongue, he will be forgiven."