رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1246
The Book of Virtues
The Excellence of Observing Saum (Fasting) in the months of Muharram and Sha'ban and the Secred Months
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: أَفْضَلُ الصِّيَامِ بَعْدَ رَمَضَانَ: شَهْرُ اللَّهِ الْمُحَرَّمِ، وَأَفْضَلُ الصَّلَاةِ بَعْدَ الْفَرِيضَةِ: صَلَاةُ اللَّيْلِ ((رَوَاهُ مُسلم)).
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "The best month for observing Saum (fasting) next after Ramadan is the month of Allah, the Muharram; and the best Salat (prayer) next after the prescribed Salat is Salat at night (Tahajjud prayers)." [Muslim].
Riyad as-Salihin, 1246