Perform ritual baths with three handfuls of water on one's head for spiritual and physical cleanliness after engaging in sexual activities or other activities that require purification.

In this hadith, the Prophet Muhammad is teaching his companions about how to properly perform a ritual bath, known as ghusl. This type of bath is done for spiritual and physical cleanliness after engaging in sexual activities or other activities that require purification. The Prophet instructed that three handfuls of water should be poured over one's head when performing this type of bath. This hadith emphasizes the importance of cleanliness and purity in Islam, which are essential components for worshipping Allah properly. It also teaches us that even small acts can have great significance when it comes to our faith and relationship with Allah.