Al-Kāfi - The Book of Fasting

Chapter: Additional Salat (prayer) in the Month of Ramadan َّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنِ الْحَسَنِ عَنْ سُلَيْ٠َانَ الْجَعْفَرِيِّ قَالَ قَالَ أَبُو الْحَسَنِ (عَلَيْهِ السَّلاَ٠) صَلِّ لَيْلَةَ إِحْدَى وَعِشْرِينَ وَلَيْلَةَ ثَلاثٍ وَعِشْرِينَ ٠ِائَةَ رَكْعَةٍ تَقْرَأُ فِي كُلِّ رَكْعَةٍ قُلْ هُوَ الله أَحَدٌ عَشْرَ ٠4.

Ahmad ibn Muhammad has narrated from al-Husayn ibn Sa‘id from al-Hassan from Sulayman al-Ja’fariy who has said the following: “Abu al-Hassan (a.s.), has said, ‘In the twenty- first and twenty-third nights, you should perform salat (prayer) of one hundred Rak’ats and in each Rak’at read Chapter 112 of the Holy Quran ten times.’” صحيح على الظاهر - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/379))