Nadr bin Shaiban says that once I met Abu Salamah bin Abdur Rahman, and I said to him: Tell me a hadith from your father which he himself heard from the Prophet (peace be upon him), and that too about the month of Ramadan. He said: Alright, my father narrated this hadith from the Prophet (peace be upon him): "Allah Almighty has made the fasting of Ramadan obligatory, and I have declared its night prayer (Qiyam) as Sunnah. Whoever fasts in Ramadan with faith and seeking reward, and performs the night prayer (Tarawih), will come out of his sins as the day his mother gave birth to him."
Hadith Referenceمسند احمد / مسند باقي العشرة المبشرين بالجنة / 1688
Hadith Gradingحکم دارالسلام:إسناده ضعيف، النضر بن شيبان ضعيف ولم يصح سماع أبى سلمة من أبيه.