Merits of the Month of Ramaḍān
Faḍāʾil al-Ashhur al-Thalātha|Volume 1|Book 3|Chapter 1
وبهذا الإسناد، قال: قال لي أبو جعفر الباقر (عليه السلام): إذا كان آخر ليلة من شهر رمضان أعتق فيها مثل ما أعتق في جميعه.
And with the same chain of transmission, he—presumably al-Ḥasan b. ʿAlī b. Faḍḍāl—said: “Abū Jaʿfar al-Bāqir عليه السلام has said to me: “On the last night of the month of Ramaḍān, as many people are given absolution (from Perdition) as in the totality of the rest of the month.”