Once Amirul Mo’mineen (as) looked at his son al-Husayn (as) and said: “My son is a master as the Prophet (S) has called him a master. Allah will make one of his (al-Husayn’s) descendants, whose name will be like the Prophet’s name and who will be like the Prophet (S) in form and morals, appear while people are in advertence, the truth is suspended and oppression is spread everywhere. The inhabitants of the heaven and the people of the earth will be happy with his advent. He is a man with bright forehead, hooked nose, big abdomen, wide thighs with a mole on the right thigh and with separated front teeth. He will fill the world with justice after it has been filled with injustice and oppression.”