Sa‘d bin Abdullah narrated from Al-Hasan bin Ali bin Abdullah bin Al-Mughirah, from Al-‘Abbas bin ‘Amir Al-Qasbani, from Al-Muthanna Al-Hannat, from Amr bin Abi Nasr, who said: I said to Abu Abdullah عليه السلام: 'I prayed, and then I remembered that I had not washed my private part after urination. Should I repeat the prayer?' Imam عليه السلام said: 'No.'"