Muhammad ibn al-Hanafiyyah
When Husayn, then in Mecca, was considering the expedition to Kufa that ended at Karbala, Muhammad ibn al-Hanafiyyah advised him not to go, pointing out that the men of Kufa had betrayed and turned against their father Ali and their brother Hasan ibn Ali, and saying that he feared that they would betray Husayn as well. Husayn replied that he feared that if he stayed in Mecca, Yazid ibn Muawiya would have him killed there, and violate the sanctity of the Holy City. Muhammad ibn al-Hanafiyyah then urged him to go instead to Yemen, where he could indefinitely elude an army. The next day Husayn replied that his grandfather Muhammad had appeared to him in a dream and required him to undertake this sacrificial expedition.