The signs preceding the appearance

(10) Muhammad bin Hammam narrated from Ja’far bin Muhammad bin Malik al-Fazari from Musa bin Ja’far bin Wahab from al-Hasan bin Ali al-Washsha’ from Abbas bin Abdullah from Dawood bin Sarhan that Abu Abdullah as-Sadiq عليه السلام had said: “Before the year of the cry (from the Heaven), there will be a sign in the month of Rajab.” He was asked: “What is it?” He said: “A face will appear on the moon and a protruding hand.”