Note 476 — Chapter XXXIV · THE PLOT RIPENS. CONSPIRATORS ATTACK MEDINA. DEATH OF OTHMAN. A.H. XXXV. A.D. 656.
Reading edition
For the Lesser Pilgrimage, or Omra, see Life of Mahomet, p. xii. It may be performed in any month of the year, but preferably in Rajab (three months earlier than the commonly received date of the attack, which I have followed); and some traditions accordingly give this as the date of the advance upon Medîna. That, however, would make the interval (from January to May) too long for the intervening events, which were hurried through within the period of a couple of months, if so long.