Perform ablution before sleeping if you are in a state of ritual impurity .

This hadith speaks about the importance of performing ablution before sleeping when one is in a state of ritual impurity. The Prophet Muhammad (peace be upon him) was asked by Umar bin Khattab if it was permissible to sleep while being ritually impure, and the Prophet replied that it was allowed as long as one performed ablution beforehand. This hadith teaches us that we should always strive to maintain cleanliness and purity, even when we are asleep. It also shows us the importance of following Islamic teachings and seeking guidance from our religious leaders on matters related to our faith.