Nu’man bin Sa’d said: A man came to Sayyiduna Ali (may Allah be pleased with him) and asked which month after Ramadan he should fast in. Sayyiduna Ali (may Allah be pleased with him) replied: Since I heard this from the Messenger of Allah (peace and blessings be upon him), no one has asked me about it until now. A man asked the Noble Prophet (peace and blessings be upon him) in which month of the year after Ramadan he should fast, so he (peace and blessings be upon him) instructed him to fast in Muharram, and said: “On this day Allah Almighty showed mercy to a people, and in the future He will show mercy to another people.” (The first people referred to are the Children of Israel, and the second people are certainly the Ummah of Muhammad, peace and blessings be upon him.)
Hadith Referenceسنن دارمي / من كتاب الصوم / 1794
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده ضعيف لضعف عبد الرحمن بن إسحاق، [مكتبه الشامله نمبر: 1797]
Hadith Takhrijاس روایت کی سند ضعیف ہے۔ دیکھئے: [ترمذي 741] ، [أبويعلی 267] ، [ابن أبى شيبه 41/3] ، [عبدالله بن الإمام أحمد فى الزوائد على المسند 155/1، وغيرهم]
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "After Ramadan, the best fasts are those of the month which you call Muharram."
Hadith Referenceسنن دارمي / من كتاب الصوم / 1795
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):زيد بن عوف متروك واتهمه أبو زرعة. ولكن الحديث صحيح، [مكتبه الشامله نمبر: 1798]
Hadith Takhrijاس روایت کی سند میں زید بن عوف متروک ہیں، لیکن دوسری اسانید سے حدیث صحیح ہے۔ دیکھئے: [مسلم 1162] ، [أبوداؤد 2429] ، [ترمذي 438] ، [نسائي 1612] ، [ابن ماجه 1742] ، [ابن حبان 2563، 3636] ، [أحمد 303/2] ، [بغوي 923، 1788]