How many surahs in the Quran begin with an oath?

In the Quran, there are 15 surahs that begin with an oath (qasm). These surahs start with phrases that invoke the name of Allah or other significant entities as a means of emphasizing the importance of the message that follows. Examples include Surah Al-Baqarah and Surah Al-Shams. The use of oaths serves to draw attention to the themes and lessons presented in the respective surahs.