An-Nadr bin Shaiban said:"I said to Abu Salamah bin 'Abdur-Rahman: 'Tell me of something that you heard from your father, that he heard from the Messenger of Allah, with no one in between your father and Messenge of Allah concerning the month of Ramadan. He said: 'Yes; my father said: The Messenger of Allah said: Allah, may He be blessed and exalted, enjoined the fast of Ramadan upon you, and I have made it Sunnah for you to spend its nights in prayer. Whoever fasts it and spends its nights in prayer out of faith and in the hope of reward, he will emerge from his sins as on the day his mother bore him."' (Daif)
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ، قَالَ حَدَّثَنَا أَبُو هِشَامٍ، قَالَ حَدَّثَنَا الْقَاسِمُ بْنُ الْفَضْلِ، قَالَ حَدَّثَنَا النَّضْرُ بْنُ شَيْبَانَ، قَالَ قُلْتُ لأَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ حَدِّثْنِي بِشَىْءٍ، سَمِعْتَهُ مِنْ، أَبِيكَ سَمِعَهُ أَبُوكَ، مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم لَيْسَ بَيْنَ أَبِيكَ وَبَيْنَ رَسُولِ اللَّهِ صلى الله عليه وسلم أَحَدٌ فِي شَهْرِ رَمَضَانَ . قَالَ نَعَمْ حَدَّثَنِي أَبِي قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ اللَّهَ تَبَارَكَ وَتَعَالَى فَرَضَ صِيَامَ رَمَضَانَ عَلَيْكُمْ وَسَنَنْتُ لَكُمْ قِيَامَهُ فَمَنْ صَامَهُ وَقَامَهُ إِيمَانًا وَاحْتِسَابًا خَرَجَ مِنْ ذُنُوبِهِ كَيَوْمِ وَلَدَتْهُ أُمُّهُ " .
Nesai
The Book of Fasting • Hadith 2210