My father used to stay up at night with ‘Ali, and ‘Ali used to wear summer clothes in winter and winter clothes in summer. It was said to me: Why don"t you ask him about that? So I asked him and he said: The Messenger of Allah (ﷺ) sent for me on the day of Khaibar and I had sore eyes, so I said:O Messenger of Allah (ﷺ), I have sore eyes. He spat in my eye and said: "O Allah, take away from him heat and cold." And I have never felt heat or cold since them. And he said: "I shall send out a man who loves Allah and His Messenger, and Allah and His Messenger love him, and he is not one to run away." The people hoped to be the one, and he sent ‘Ali (رضي الله عنه).