My father narrated to us. He said: `Ali b. Musa al-Kamnadani narrated to us. He said: Ahmad b. Muhammad b. `Isa narrated to us from `Ali b. al-Husayn from Muhammad b. `Ubayd from Ubayd b. Harun . He said: Abu Yazid narrated to us from Hussayn from al-Sadiq Ja`far b. Muhammad from his father from his forefathers . He said: Amir al-Mu'minin said:

In the month of Ramadan, betake to much repentance and supplication. As for supplication, it will repel calamity from you; and as for repentance, it will remove sins from you.