Abu Hurayrah relates that Rasulullah (SAW) said,
"My Ummah were given five things for Ramadhaan which were not given to anyone except them. For them, the smell from the mouth of a fasting person is more sweeter to Allah than the fragrant smell of musk. On their behalf the fish in the sea seek forgiveness for the fasting persons until they break their fast. Allah prepares and decorates a special garden in Jannah everyday and then says (to it), "The time is near when faithful servants shall cast aside the great trials of the world and come to you". In this month (for them) evil-minded Shaytaan is chained so as not to reach unto those evils to which they normally reach during other months besides Ramadhaan. On the last night of Ramadhaan they are forgiven". Hadith