Perform wudu before sleeping even when not in a state of ritual purity .

This hadith explains that it is permissible for a person to sleep while in a state of ritual impurity known as Junub. This is only allowed if the person has performed ablution or wudu beforehand. The hadith was narrated by Umar bin Al-Khattab who asked the Prophet Muhammad ﷺ this question and received his answer. This shows us that it is important to ask questions and seek knowledge from reliable sources such as the Prophet Muhammad ﷺ himself. It also teaches us that we should always perform ablution before sleeping even if we are not in a state of ritual purity so that we can be spiritually clean and ready for prayer at any time.