Do not withhold or waste any extra water you have access to.

This hadith is a reminder from Allah's Messenger, Muhammad ﷺ, about the importance of conserving water. He encourages us to not withhold or waste any extra water that we have, as it can lead to the growth of superfluous grass which is unnecessary and a waste of resources. This hadith teaches us that we should be mindful and careful with our resources, especially when it comes to something as precious and essential as water. We should use what we need but also be aware that there are others who may need it too. We must remember that Allah has given us these resources for our benefit and so they should be used wisely and with care.