question #1 Sahih al-Bukhari 38, Book 2, Hadith 31 : What are the spiritual benefits of fasting during the month of Ramadan with sincere faith?

Allah’s Messenger (ﷺ) said, “Whoever observes fasts during the month of
Ramadan out of sincere faith, and hoping to attain Allah’s rewards,
then all his past sins will be forgiven.”