Converts to Islam came from nearly all Arab tribes present in Medina, such that by June of the subsequent year there were seventy-five Muslims coming to Mecca for pilgrimage and to meet Muhammad. Meeting him secretly by night, the group made what was known as the "Second Pledge of al-`Aqaba", or the "Pledge of War".[21] Conditions of the pledge, many of which similar to the first, included obedience to Muhammad, "enjoining good and forbidding evil" as well as responding to the call to arms when required.[23]