Chapter on Ritual Washings (Ghusl) and the Method of Performing Ghusl for Janabah (major impurity)

Al-Husayn bin Saeed, from Al-Hasan, from Zur'ah, from Sama’ah, who said: I asked Imam عليه السلام about a man who sees semen on his garment after waking up in the morning but did not see in his dream that he experienced a wet dream. Imam عليه السلام said: "He should perform ghusl, wash his garment, and repeat his prayer."