The permissibility of depictions of Muhammad in Islam has been a contentious issue. Oral and written descriptions of Muhammad are readily accepted by all traditions of Islam, but there is disagreement about visual depictions. The Quran does not explicitly forbid images of Muhammad, but there are a few hadith (supplemental teachings) which have explicitly prohibited Muslims from creating visual depictions of figures. It is agreed on all sides that there is no authentic visual tradition as to the appearance of Muhammad, although there are early legends of portraits of him, and written physical descriptions whose authenticity is often accepted.