Hadith 1164
Abu Ayyub al-Ansari (RA) reported Allah's Messenger (ﷺ) as saying: He who observed the fast of Ramadan and then followed it with six (fasts) of Shawwal it would be as if he fasted perpetually.
Hadith 1164
Abu Ayyub al-Ansari reported (through another chain of transmitters): I heard Allah's Messenger (ﷺ) saying like this.
Hadith 1164
Abu Ayyub reported a hadith like this (through another chain of transmitters).