On the right leg of Hazrat Mahdi (as) there will be a mark darker in shade than his complexion, structure of his leg will be wide just like his body figure
(HZ. MAHDI (AS)’S) LEGS ARE WIDE, WELL-BUILT AND THERE IS A MARK ON HIS RIGHT LEG IN OPPOSITE COLOR OF HIS BODY COMPLEXION.
(Mu'jam al-Hadith, Imam Mahdi V. 4 p.154 and Kamal ad-Din V. 2 p. 376 and Bihar V. 52 p. 322)
ON THE RIGHT LEG [OF HZ. MAHDI (AS)] THERE IS A BLACK MARK.
(Sheikh Muhammad ibn Ibrahim Nomani, al-Ghaybah al-Nomani p. 251)