Q: What is your opinion, respected shaykh, regarding people who claim that fasting for six days in Shawwal is Bid‘ah (innovation in religion) and that this is the view of Imam Malik? If they are refuted by the Hadith on the authority of Abu Ayyub, saying: Anyone who fasts Ramadan and then follows it with (fasting) six days of Shawwal it is as if they fasted the whole year they would bring to question the authenticity of one of the narrator in the Isnad (chain of narrators).
A: This claim is Batil (null and void); the Hadith of Abu Ayyub is Hadith Sahih (a Hadith that has been transmitted by people known for their uprightness and exactitude; free from eccentricity and blemish).
( Part No : 15,Page No:390)
It also has other supporting narrations, which strengthen it and confirm its meaning.
May Allah grant us success! May peace and blessings be upon our Prophet Muhammad, his family, and Companions!