Well, the narration clearly states that this is Abu Qatada Al-Ansari, the noble companion of the Prophet (peace be upon him).
However, there is strong evidence to indicate that this is not the case.
This indicates that Al-Bukhari weakens this report due to a disconnection.
Tarikh Al-Duri #3954
Hence, the hadith is disconnected.
It is safe to say that Abu Qatada's claim about this merit is a false one. By extension, the same applies to Abu Qatada's claim that the fasting of Arafa expiates the sins of two years.
He said: If this was the case, then why didn't Abu Bakr and Omar do it?!
Tahtheeb Al-Athar 1/364
- Abu Qatada was a tabi'i, who never met the Prophet (peace be upon him)
- Abu Qatada attributes a false merit to fasting Ashura as well
- Tawus denies the authenticity of this merit and claims that Abu Bakr and Omar didn't believe in it
Inshallah in the coming days, I will be posting more evidence to prove that the fasting of Arafa should NOT be observed from a prophetic hadith and the actions of the companions.
May Allah guide us all to the straight path.