Invalidating Wudu' during Salah

A: A person who offers Salah should not leave it until he is sure that something has broken his Wudu' because of what has been related in Sahih Al-Bukhari and Sahih Muslim on the authority of `Abdullah ibn Zayd (may Allah be pleased with him) that he said: A person made a complaint to the Messenger (peace be upon him) that he entertained (doubt) as if something had happened to him breaking his Wudu'. He (the Prophet) said, "He should not leave (Salah) unless he hears a sound or perceives a smell (of passing wind)." The meaning is: When Wudu' is definitely broken by the discharge of Madhy or other things which nullify ablution, a person should perform Wudu' and Salah again. It has been related in Sahih Al-Bukhari and Sahih Muslim on the authority of `Aly (may Allah be pleased with him) who said: I used to get emotional urethral discharge frequently. Being the son-in-law of the Prophet (peace be upon him), I felt ashamed to ask him. So I requested (Part No. 6; Page No. 199)  Al-Miqdad ibn Al-Aswad to ask (the Prophet, peace be upon him) about it. Al-Miqdad asked him and he replied: Perform ablution after washing your organ (penis). May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.