His beard will be thick and luxurious. (al-Haythami, Al-Qawl al-Mukhtasar, p. 23)
His beard is thick. (Barzanji, Al-Isha'ah, p. 163)
He is a young man. Of medium height. He has a beautiful face. His hair hangs down over his shoulders. The radiance of his face lends him majesty. His hair is black. His beard is black. (Fera Idu Fevaidi'l Fiqr Fi'l Imam al-Mahdi al-Muntadhar)
He (the Mahdi) is a young man of medium stature and with a beautiful face . The radiance of his face shines like day in his hair, beard, and the blackness of his head, and gives him greatness.
(Al-Uqayli, Al-Najmu al-Saqib)