Muhammad bin Ali bin Mahbub, from Ali bin Al-Sindi, from Hammad bin Isa, from Shu'ayb, from Abu Basir, who said: I asked Abu Abdullah عليه السلام about a man who finds semen on his garment but does not know that he experienced a wet dream. Imam عليه السلام said: "He should wash what he finds on his garment and perform wudu."