What is the authenticity of this Hadith?
Rasulullah (sallallahu ‘alayhi wa sallam) said: “Whoever fasts on the day of ‘Aashura (10th of Muharram) will be granted the reward of ten thousand (10 000) angels.”
Imam Bayhaqi (rahimahullah) has recorded this Hadith on the authority of Sayyiduna ‘Abdullah ibn ‘Abbas (radiyallahu ‘anhuma) as part of a longer narration.
(Fadailul Awqat, Hadith: 237)
However, the Muhaddithun have declared this narration a fabrication.
(Refer: Tanzihush Shari’ah, vol. 2 pg. 149, Al Atharul Marfu’ah, pg. 94/95. Also see: Lisanul Mizan, vol. 2 pg. 546, number: 2114)
The following authentic virtue of fasting on ‘Aashura should be quoted instead:
Rasulullah (sallallahu ‘alayhi wa sallam) is reported to have said: “I hope from Allah that fasting on the day of ‘Aashura may atone for the sins of the preceding year.”
(Sahih Muslim, Hadith: 2738. See here)
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala
Approved by: Moulana Muhammad Abasoomar
This answer was collected from HadithAnswers.com. The answers were either answered or checked by Moulana Haroon Abasoomar (rahimahullah) who was a Shaykhul Hadith in South Africa, or by his son, Moulana Muhammad Abasoomer (hafizahullah), who is a Hadith specialist.