Muḥammad ibn Isḥāq ibn Yasār ibn Khiyār (; according to some sources, ibn Khabbār, or Kūmān, or Kūtān, , or simply ibn Isḥaq, ابن إسحاق, meaning "the son of Isaac"; died 767 or 761) was an Arab Muslim historian and hagiographer. Ibn Ishaq collected oral traditions that formed the basis of an important biography of the Islamic prophet Muhammad.