Wash your hands before drinking water from ponds or other sources.

The hadith narrated by Ibn 'Umar teaches us the importance of cleanliness and hygiene. It is important to wash our hands before drinking water, especially if it is from a pond or other sources that may not be as clean as tap water. This is because the hand is the best vessel for drinking water, and washing it beforehand will help ensure that we are not consuming any germs or bacteria that could make us sick. Furthermore, this hadith also serves as an example of how Prophet Muhammad (PBUH) was always mindful of his followers' health and wellbeing, even in small matters such as this one. He wanted to ensure that they were taking care of themselves in all aspects of life, including their physical health.