Hazrat Mahdi's (as) forehead will be bright

Abu Sa’id al-Khudri narrates from the Messenger of Allah (saas) that he said, “Indeed, Almighty Allah will raise from my progeny and Ahl al-Bayt a man, who would ... HAVE A BRIGHT FOREHEAD so that he may fill the earth with justice, welfare and economic equality.” (Iqdud Durar, p. 101)