Chapter: Can one select some special days (for observing Saum (fast))?

Hadith Number 1987

setting

Narrated Alqama

I asked `Aisha "Did Allah s Apostle, use to choose some special days (for fasting)?" She replied, "No, but he used to be regular (constant) (in his service of worshipping). Who amongst you can endure what Allah's Messenger (ﷺ) used to endure?"