VOLUNTARY PRAYERS DURING RAMADAN H 1211 "The Messenger of Allah, praise and peace be upon him, would encourage the Companions to offer the voluntary prayer during Ramadan but did not order them. He said, 'Whosoever offers the voluntary prayer during Ramadan in belief and charging Allah for its recompense will have his past sins forgiven.'" R 1211 Muslim with a chain up to Abu Hurairah who related that the Messenger of Allah, praise and peace be upon him, said this.
1188- وعنه رضي الله عنه ، قَالَ : كَانَ رسولُ اللهِ صلى الله عليه وآله وسلم يُرَغِّبُ في قِيَامِ رَمَضَانَ مِنْ غَيْرِ أنْ يَأمُرَهُمْ فِيهِ بِعَزِيمَةٍ ، فيقولُ : "مَنْ قَامَ رَمَضَانَ إيمَاناً وَاحْتِسَاباً غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ" رواه مسلم .