Build walls around pieces of land

The Prophet Muhammad taught that if someone builds a wall around a piece of land, then the land belongs to them. This hadith is an example of how people can gain ownership over something through their own efforts and hard work. It also teaches us the importance of respecting other people's property and not taking what does not belong to us without permission. Furthermore, this hadith encourages us to be productive and use our resources wisely in order to gain ownership over something we desire.