Narrations, especially in Sunni sources, are subject to damage such as fabrication and distortion. The prevalence of these cases after the Prophet (PBUH) increases the necessity of critiquing the narrations, including the narrations of the reasons for the revelation of verses 91-92 of Surah An-Nahl, using the presentation method. This research aims to identify the reasons that agree with and disagree with the Quran in the mentioned verses and to separate the authentic narrations in the sources of both sects, seeking to remove the obstacles to reaching the correct reason and understanding the meaning of the verse. For this purpose, the present research is organized using the critical analysis method. Based on the findings of the research, three categories of narrations of the reason for the revelation in Sunni sources have been stated for these verses: Pledge of allegiance to the Prophet (PBUH) for Islam; Covenant of the people of ignorance; Sa’idah al-Asadiyyah. In the process of presenting the Quran, all three reasons are against the Quran and invalid for different reasons, such as incompatibility with the last part of verse 92 and verse 94. The arrogance of some people in accepting the guardianship of the Commander of the Faithful (PBUH) is the only reason for the revelation in Shiite narrations that do not have any of the objections and are in accordance with the Quran. Proving the guardianship of the Commander of the Faithful (PBUH), with the obligatory implication of this reason, is one of the results of achieving the correct reason.