Hadith 1297
۞
Surely, the greatest treachery is the treachery against the Muslim community, and the ugliest deceit is the deceit towards the Muslim leaders; and that is an end to the matter.
وَإِنَّ أَعْظَمَ الْخِيَانَةِ خِيَانَةُ الْأُمَّةِ، وَأَفْظَعَ الْغِشِّ غِشُّ الْأَئِمَّةِ، وَالسَّلَامُ.