Sayyiduna Ali (may Allah be pleased with him) said that I used to have a lot of madhi (pre-seminal fluid), and since the daughter of the Prophet (peace be upon him) was in my marriage, I felt shy to ask the Prophet (peace be upon him) about this issue myself. So I asked Sayyiduna Miqdad (may Allah be pleased with him) to ask the Prophet (peace be upon him) about this issue. Accordingly, he asked about this issue, and the Prophet (peace be upon him) said that such a person should wash his private part and perform ablution.