In recent decades, Orientalists have made many efforts in studying and examining Islamic sources. Of course, these efforts are sometimes investigative and sometimes biased, and one of their important movements is the compilation of the Leiden's Qur'an Encyclopedia. The present paper, using the descriptive-analytical method as well as Qur'anic and narrative evidence and referring to the interpretations of the Two Sects (Sunni and Shia), has reviewed the entries of the revelation types related to the prophets (PBUTH) in the Leiden's Qur'an Encyclopedia. The problems with the entry are organized in two structural and content sections. The structural problems of the entry are manifested in loss of order, and lack of connection between topics and their content. Content problems generally include: Making mistakes in understanding the words and appearance of Quranic verses, error in interpretation of verses, mistakes in reasoning and drawing conclusions from it. The author of the mentioned entry tried to question the authenticity of the revelation by bringing expressions such as: the prophetic experience of Muhammad, the ambiguity and contradictions in the verses of the Quran, the honest dream of Muhammad and presenting incorrect interpretations of the verses and relying on unreliable sources. The most important critique is about this entry