question #2 Sahih Muslim 306c, Book 3, Hadith 26 : How does Islam guide individuals to maintain cleanliness and purity before sleeping?

Umar b. al-Khattab said to the Messenger of Allah (ﷺ), that he became Junbi during the night. The Messenger of Allah (ﷺ) said to him: Perform ablution, wash your sexual organ and then go to sleep.