The Mahdi has a thick beard, bright front teeth, a mole on his face, and a broad forehead.
(Fera Idu Fevaidi'l Fiqr)
He has a mole on his face. (al-Haythami, Al-Qawl al-Mukhtasar, p. 41)
There is a mole on his face. (Ali Ibn Husamaddin al-Muttaki)
There is a mark on his cheek, reminiscent of a pearl, illuminating his face like a star. (Muhammad Ibn Rasul al-Husseini al-Barzanji, "Portents of Doomsday" Pamuk Publications, Trans. Naim Erdogan)