Unite with fellow Muslims peacefully without resorting to violence or cutting ties with them completely.

This hadith is a warning from the Prophet Muhammad ﷺ to all Muslims against disunity and violence among themselves. He warned that if they were to break apart, it would be like striking each other's necks, which is a metaphor for killing each other in battle or through any other means of violence. He was emphasizing the importance of unity and non-violence within the Muslim community, so that they could remain strong in their faith and continue to spread Islam peacefully throughout the world.