´An-Nu'man bin Sa'd narrated:` "A man asked Ali: "Which month do you order me to fast after the month of Ramadan?' He said to him, 'I have not heard anyone ask this except for a man whom I heard asking the Messenger of Allah while I was sitting with him. He said: "O Messenger of Allah! Which month do you order me to fast after the month of Ramadan?" He said: "If you will fast after the month of Ramadan, then fast Al-Muharram, for indeed it is Allah's month in which there is a day that Allah accepted the repentance of a people, and in which He accepts the repentance of other people."
Hadith Referenceسنن ترمذي / كتاب الصيام عن رسول الله صلى الله عليه وسلم / 741
Hadith Gradingالألبانی:ضعيف، التعليق الرغيب (2 / 77) // ضعيف الجامع الصغير (1298) // | زبیر علی زئی:(741) إسناده ضعيف, عبدالرحمن بن إسحاق الكوفي: ضعيف (د 756)
Hadith Takhrij«تفرد بہ المؤلف ( تحفة الأشراف : 10295) (ضعیف) (سند میں نعمان بن سعد لین الحدیث ہیں، اور ان سے روایت کرنے والے ’’ عبدالرحمن بن اسحاق بن الحارث ابو شیبہ ‘‘ ضعیف ہیں)»