Muhammad is significant to religion.
The Hegira or Hijrah ( [ ) is the migration or journey of the Islamic prophet Muhammad and his followers from Mecca to Yathrib , later renamed by him to Medina , in the year 622 . Muhammad . There are also smaller sects which believe Muhammad to be not the last Prophet : Besides the Quran , Muhammad 's teachings and practices ( sunnah ) , found in the Hadith and sira literature , are also upheld by Muslims and used as sources of Islamic law ( see Sharia ) .