question #1 Sahih al-Bukhari 37, Book 2, Hadith 30 : What is the significance of performing prayers during the nights of Ramadan with sincere faith?

Allah’s Messenger (ﷺ) said: “Whoever establishes prayers during the nights
of Ramadan faithfully out of sincere faith and hoping to attain
Allah’s rewards (not for showing off), all his past sins will be
forgiven.”