Perform wudu and wash your penis before sleeping if you become junub at night

This hadith is about the importance of performing wudu and washing one's penis before sleeping if one has become junub in the night. Junub is a state of ritual impurity which requires a person to perform ghusl or full body ablution before they can pray or touch any holy book such as Quran. In this hadith, Prophet Muhammad (PBUH) advised Umar Ibn Al Khattab to do wudu and wash his penis before going to sleep if he was in a state of junub at night. This hadith teaches us that it is important for Muslims to maintain cleanliness even when they are not praying or engaging in religious activities so as not be impure when engaging with God's words or prayers. It also teaches us about personal hygiene which is an important part of our faith as Muslims.