Narrated byAbu Ayyub:
Arabic (Original)
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ قَالَ سَمِعْتُ وَرْقَاءَ يُحَدِّثُ عَنْ سَعْدِ بْنِ سَعِيدٍ عَنْ عُمَرَ بْنِ ثَابِتٍ عَنْ أَبِي أَيُّوبَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَنْ صَامَ رَمَضَانَ وَسِتًّا مِنْ شَوَّالٍ فَقَدْ صَامَ الدَّهْرَ.
English Translation
It was narrated from Abu Ayyub: that the Messenger of Allah, peace and blessings be upon him, said, "Whoever fasts Ramadan and follows it with six days of Shawwal has fasted as if for a lifetime."