Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrated: The Prophet (peace and blessings be upon him) said: "Whoever fasts on the day of Arafah, it becomes an expiation for him for (the sins of) two years; and whoever fasts one day of Muharram receives, in return for each day's fast, the reward of fasting thirty days."
Imam al-Tabarani recorded it in al-Mu'jam al-Saghir. Its chain contains a narrator, al-Haytham bin Habib, whom Imam al-Dhahabi declared da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصيام / 5148
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«أخرجه المعجم الصغير للطبراني برقم: 924»