Narrated Ibn 'Umar: That the Prophet ﷺ allowed people who provided the pilgrims with water to stay at Mecca during the nights of Mina.
The nights of Mina are a time when Muslims from all over the world come together to perform Hajj or pilgrimage at Makkah. During this time, there is a great need for water as many people come together from different places and need hydration due to the hot weather conditions. Thus, providing water becomes an important task which needs attention and care from everyone present there so that no one suffers due to lack of access to clean drinking water. In order recognize their efforts and show appreciation for their hard work, Prophet Muhammad ﷺ allowed these people who provided water with permission to stay at Makkah during these nights instead of having them leave after they had done their job as was customary before his time.