question #3 Sahih al-Bukhari 464, Book 8, Hadith 112 : What is the significance of reciting specific Surahs during prayer according to Islamic tradition?

I complained to Allah’s Messenger (ﷺ) that I was sick. He told me to perform the Tawaf behind the people
while riding. So I did so and Allah’s Messenger (ﷺ) was praying beside the Ka`ba and reciting the Sura
starting with “Wat-tur wa kitabin mastur.”