It is narrated from Sayyiduna Miqdad bin Aswad (may Allah be pleased with him) that Sayyiduna Ali bin Abu Talib (may Allah be pleased with him) instructed him to ask the Messenger of Allah (peace and blessings of Allah be upon him) about the person who, when he approaches his wife, pre-seminal fluid (madhi) is discharged—what is obligatory upon him? Sayyiduna Ali (may Allah be pleased with him) said, "Since the daughter of the Messenger of Allah (peace and blessings of Allah be upon him) is with me (in my marriage), I feel shy to ask him this question." Sayyiduna Miqdad (may Allah be pleased with him) says that I asked the Messenger of Allah (peace and blessings of Allah be upon him) about this issue. He (peace and blessings of Allah be upon him) said: "When any one of you finds (that madhi has been discharged), he should wash his private part and perform ablution (wudu) as he does for prayer."