“When Harun ibn al-Musayyib decided to fight Muhammad ibn Ja‘far, abu al-Hassan (a.s.) told me to go to him and say, “Do not go our tomorrow. If would do so you will be defeated and your people will be killed.” If he would ask, “How do youknow that?” Say, “I saw it in my dream.” The narrator has said that he went to him and said, “May Allah make of service to you, do not go out tomorrow to fight. If would do so you will be defeated and your people will be killed.” He asked, “How do you know this?” I said, “I saw it in my dream.” He said, “A slave goes to sleep (to dream) and his behind is not even washed.” He went out to fight. He was defeated and his people were killed.” The narrator has said that Musafir narrated, “I was in the presenceof al-Rida (a.s.) in Mina, Makka that Yahya ibn Khalid passed by and he covered his head from the dust. The Imam (a.s.) said, “Poor people do not know what will happen to them this year.” I, by Allah, could not understand themeaning of his statement until we buried him (Yahya ibn Khalid).”