Send messengers as an indication of permission for someone else's entry into your space .

This hadith explains that when someone sends a messenger to another person, it is an indication of their permission for the other person to enter. This means that if someone sends a messenger or representative to another person with an invitation or request for them to come and visit them, then this is considered as giving the other person permission and they can accept the invitation without any hesitation. The Prophet Muhammad ﷺ taught us that this is a sign of respect and politeness between people. It also teaches us about being considerate towards others by not entering their space without their consent. Furthermore, it encourages us to be mindful of our actions and words when interacting with others in order to maintain good relationships with them.