Al-Kāfi - Volume 4 > Additional Salat (prayer) in the Month of Ramadan
Hadith #2

2ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى بْنِ عُبَيْدٍ عَنْ يُونُسَ عَنْ أَبِي الْعَبَّاسِ الْبَقْبَاقِ وَعُبَيْدِ بْنِ زُرَارَةَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ كَانَ رَسُولُ الله (صلَّى اللهُ عَلَيْهِ وَآلِه) يَزِيدُ فِي صَلاتِهِ فِي شَهْرِ رَمَضَانَ إِذَا صَلَّى الْعَتَمَةَ صَلَّى بَعْدَهَا فَيَقُومُ النَّاسُ خَلْفَهُ فَيَدْخُلُ وَيَدَعُهُمْ ثُمَّ يَخْرُجُ أَيْضاً فَيَجِيئُونَ وَيَقُومُونَ خَلْفَهُ فَيَدَعُهُمْ وَيَدْخُلُ مِرَاراً قَالَ وَقَالَ لا تُصَلِّ بَعْدَ الْعَتَمَةِ فِي غَيْرِ شَهْرِ رَمَضَانَ.

2. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa ibn ‘Ubayd from Yunus from abu al-‘Abbas al-Baqbaq and ‘Ubayd ibn Zurarah who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, would increase his salat (prayer) during the month of Ramadan. After al-‘Atmah (late evening salat [prayer]), he would perform more prayers. People behind would stand up (for prayer), but he would go inside and leave them. Then, after he came out, they would come and stand up behind him (for prayer), but he would leave them and go inside several times.’ He (the narrator) has said that the Imam then said, ‘You must not perform salat (prayer) after late evening prayer during the times other than the month of Ramadan.’”