Go to bed while being in a state of purity and lay one's head on their right hand before sleeping.

This hadith is about the importance of going to bed in a state of purification. It is narrated by Al-Bara b. Azib that the Prophet Muhammad ﷺ said when you go to bed while you are in the state of purification, lay your head on your right hand. This means that it is important for Muslims to be clean and pure before they go to sleep at night as this will help them have a peaceful and restful sleep. Additionally, it also teaches us that we should take care of our physical health and hygiene as part of our religious practice which will help us lead healthier lives overall.