Muhammad b. Ahmad al-Sinani al-Mukattib narrated to us. He said: Muhammad b. Abi `Abdullah al-Kufi narrated to us. He said: Musa b. `Imran al-Nakha`i narrated to us from his uncle al-Husayn b. Yazid from `Ali b. Salim from his father. He said:

I visited al-Sadiq Ja`far b. Muhammad in Rajab, when it [still] had [a few] days left. When he looked at me, he said to me: O Salim! Have you fasted at all this month? I said: No, by Allah, O son of the Messenger of Allah. So, he said to me: You have missed out on a reward, that value of which is only known to Allah. Surely, Allah gave this month virtue, and He magnified its sanctity. He made His blessing incumbent upon those who fast in it. He said: So, I said to him: O son of the Messenger of Allah! If I fast something of what is left of it, will I receive some of the reward of those who have fasted therein? So, he said: O Salim! Whoever fasts one day at the end of this month, it will be a source of safety for him at the pangs of death; and a source of safety for him at the horror of the resurrection and the punishment of the grave. Whoever fasts two days at the end of this month, he will be able to pass safely therewith upon the Path. Whoever fasts three days at the end of this month, it will be a source of safety from the horror and the severity of Great Day of Dismay; and it will separate him from the Fire.