Chapter on the Reward of Fasting in Sha’ban
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 2|Chapter 7
وَ رَوَى عَمْرُو بْنُ خَالِدٍ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ قَالَ: «كَانَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ يَصُومُ شَعْبَانَ وَ شَهْرَ رَمَضَانَ يَصِلُهُمَا وَ يَنْهَى اَلنَّاسَ أَنْ يَصِلُوهُمَا وَ كَانَ يَقُولُ «هُمَا شَهْرُ اَللَّهِ وَ هُمَا كَفَّارَةٌ لِمَا قَبْلَهُمَا وَ مَا بَعْدَهُمَا مِنَ اَلذُّنُوبِ» ».
Amr ibn Khalid narrates from Abu Ja‘far Imam Muhammad ibn Ali Al-Baqir عليه السلام, who said: "The Messenger of Allah سبحانه وتعالى (peace and blessings be upon him and his family) would fast Sha‘ban and the Month of Ramadan together without separating them, but he would forbid people from joining them together. He used to say: ‘They are the months of Allah سبحانه وتعالى, and they are an expiation for the sins committed before and after them.’”
- Ṣaḥīḥ al-Faqīh