Perform wudu with warm or lukewarm water that has been heated by fire.

This hadith is about the importance of performing wudu, a ritual washing before prayer in Islam. The Prophet Muhammad advised to use water that has been heated by fire for this purpose. This is because hot water can help cleanse the body more effectively than cold water, and it also helps open up pores and relax muscles. It is important to note that this does not mean one should use boiling hot water as it can cause burns or other injuries if used improperly. Instead, one should use warm or lukewarm water for their wudu ritual. Additionally, this hadith teaches us the importance of taking care of our bodies and using proper hygiene practices in order to stay healthy and clean both physically and spiritually.