FREEDOM FROM ONE'S SINS H 1172 "The five (obligatory) daily prayers between the Friday prayer to the next Friday prayer and the observance of one Ramadan to the next atone for all the sins in between as long as no major sins have been committed." R 1172 Muslim with a chain up to Abu Hurairah who related that the Messenger of Allah, praise and peace be upon him, said this.
1149- وعنه ، عن النبيِّ صلى الله عليه وآله وسلم ، قَالَ : "الصَّلَوَاتُ الخَمْسُ ، وَالجُمُعَةُ إِلَى الجُمُعَةِ ، وَرَمَضَانُ إِلَى رَمَضَانَ ، مُكَفِّراتٌ مَا بَيْنَهُنَّ إِذَا اجْتُنِبَتِ الكَبَائِرُ" رواه مسلم .