Hazrat Mahdi (as) will have a mark (scar) on his forehead

Humran bin A'ayan says: I asked Imam Muhammad Baqir (as): ... THERE WILL BE A MARK ON HIS [Hazrat Mahdi’s (as)] FOREHEAD, and a mole on his face. (Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani,xmqp. 252)

Humran bin A'ayan quotes Imam Muhammad Baqir (as) that he said: "... Hazrat Mahdi (as), WILL HAVE A MARK ON HIS FOREHEAD, and his face will be beautiful..." (Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani, p. 252-253)

Abu Bashir says: