The Prophet ﷺ once said; “Indeed the stars are the protectors of the skies when they will disappear then that will come which was promised, (meaning the skies will be torn apart). I am the protector of my companions. When I will leave then that will come which was promised, (i.e. disputes). My companions are the protectors of my Ummah. When they will leave, then that will come which was promised to come, (lies, false religions and intermingling with the infidels”)
(Ahmad and Muslim narrate from Abu Musā al-Ash’ari (RadiAllahu anhum).