Al-Nadr bin Shayban (may Allah have mercy on him) narrates: I said to Abu Salamah bin Abdul Rahman (may Allah have mercy on him): "Will you not narrate to us a hadith that you heard from your father and that your father heard from the Messenger of Allah (peace and blessings be upon him)?" He said: Sayyiduna Abdul Rahman bin Awf (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) mentioned Ramadan and said: "Ramadan is a month whose fasting Allah has made obligatory, and I have made its night prayer (qiyam) a Sunnah for the Muslims. So whoever fasts it and stands in prayer during it comes out of sins like the day his mother gave birth to him."
Hadith Referenceمسند أبي يعلى الموصلي / من مسند عبد الرحمن بن عوف / 865
Hadith Takhrij«قال سعيد بن محمد السناري: منكر: سندًا ومتنًا و» «أخرجه سنن النسائي برقم: 2208، 2210، وأخرجه سنن ابن ماجه برقم: 1328، وأخرجه مسند أحمد برقم: 1691، وأخرجه صحيح ابن خزيمة برقم: 2201، مسند ابویعلیٰ ترقیم الاثری: 860»