Hadiths About the Recommendation to Fast theFirst 10 Days of Dhul-Hijjah
1-The Hadith which reads “Fasting on one of these days (the first ten days of Dhul-Hijjah) is equivalent to fasting for a year” has a da‘if isnad (weak chain of transmission) because of an-Nahhas ibn Qaham and and Mas‘ud ibn Wasil 2- The hadith which reads “There are five things that the Prophet (peace and blessings of Allah be upon him) never failed to do…” is based on the report narrated by Hunaydah ibn Khalid al-Khuza‘i, from whom it was narrated via many isnads, in several versions. The critics of hadith differed as to the classification of this hadith because each of these versions has its own isnad and text. For more, see the detailed answer.
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