Hadith on Fasting: The best fast after Ramadan is in al-Muharram

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “The best prayer after the prescribed prayers is a prayer offered in the middle of the night. The best fast after the month of Ramadan is a fast in the month of Allah, al-Muharram.

Source: Ṣaḥīḥ Muslim 1163

Grade: Sahih (authentic) according to Muslim

عن أبي هريرة قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَفْضَلُ الصَّلاَةِ بَعْدَ الصَّلاَةِ الْمَكْتُوبَةِ الصَّلاَةُ فِي جَوْفِ اللَّيْلِ وَأَفْضَلُ الصِّيَامِ بَعْدَ شَهْرِ رَمَضَانَ صِيَامُ شَهْرِ اللَّهِ الْمُحَرَّمِ

صحيح مسلم كتاب الصيام أفضل الصيام بعد رمضان شهر الله المحرم 1163