By old custom, during the months of pilgrimage, tribal hostilities stopped and all were free to visit Mecca.[citation needed] In March 628, Muhammad put on the garb of a pilgrim and taking a force and camels for sacrifice, set out for Mecca.[44] According to the early chronicler Ibn Ishaq, Muhammad took 700 men (Guillaume 1955, p. 500). According to Watt, Muhammad took 1400 to 1600 men (Watt 1957, p. 46).