Perform ablution when coming into contact with one's genital organ

This hadith is about the importance of performing ablution, or wudu', after touching one's genital organ. It was narrated by 'Urwah bin Az-Zubair who said that he entered upon Marwan bin Al-Hakam and they discussed things for which wudu' is done. Marwan said that wudu' should be done after touching one's penis, to which 'Urwah replied that he did not know that. Marwan then told him that Busrah bint Safwan had informed him that she heard the Prophet Muhammad say "And if any one of you touches his penis, let him do Wudu". This hadith emphasizes on the importance of performing ablution when coming into contact with one's genital organ as it is a form of purification from impurities and a way to maintain cleanliness in Islam.