Hadith 1254 - Bab 228 (The Desirability of Fasting six Days in the Month of Shawwal)
Chapter 9 (The Book of Virtues)

Abu Ayyub (May Allah be pleased with him) reported: The Messenger of Allah (Peace be upon him) said, "He who observes As-Saum (the fasts) in the month of Ramadan, and also observes As-Saum for six days in the month of Shawwal, it is as if he has observed As-Saum for the whole year."

[Muslim].

Selon Abou Ayùb (das), le Messager de Dieu (bsdl) a dit: «Celui qui a jeûné le mois de Ramadan puis l"a fait suivre de six jours de Shawàl (10e mois " lunaire), c"est comme s"il avait jeûné tout le temps». (Rapporté par Moslem)