And from him, from Hammad, from Hariz, from Muhammad ibn Muslim, from Abu Abdillah عليه السلام, peace be upon him, who said: Imam عليه السلام mentioned semen (mani) and emphasized its impurity, considering it more severe than urine. Then Imam عليه السلام said: "If you see semen before or after entering the prayer, you must repeat the prayer. But if you looked at your garment and did not see it, and then prayed in it, and later saw it, then there is no need for you to repeat the prayer. And the same applies to urine."