Muhammad [PBUH] is deemed as illiterate [ummi]. The word of ummi and its derivation was stated in the Qur'an six times; two words are in singular [ummi], which refer to Muhammad; and four are in plural [ummiyyun], which indicate to the People of Book [jews] and Arabs. To understand meaning of the word within the Qur'an, we should take its surrounding context into account. Referring ummi to illiā¦