when a chapter is revealed some people ask others whose faith among you people has received strength from this ? it certainly strengthens the faith of the believers and they consider it to be a glad news.
وإذا ما أنزلت سورة فمنهم من يقول أيكم زادته هذه إيمانا فأما الذين آمنوا فزادتهم إيمانا وهم يستبشرون