Mishkat al-Masabih 4 Prayer كتاب الصلاة 1

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الصَّلَوَاتُ الْخَمْسُ وَالْجُمُعَةُ إِلَى الْجُمُعَةِ وَرَمَضَانُ إِلَى رَمَضَانَ مُكَفِّرَاتٌ لَمَّا بَيْنَهُنَّ إِذَا اجْتُنِبَتِ الْكَبَائِر» . رَوَاهُ مُسلم

Abu Huraira reported God’s Messenger as saying, “The five [daily] prayers, Friday to Friday and Ramadan to Ramadan make atonement for what has happened since the previous one when major sins have been avoided.” Muslim transmitted it.