I heard the Prophet ﷺ saying, "None plots against the people of Medina but that he will be dissolved (destroyed) like the salt is dissolved in water."  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ لاَ يَكِيدُ أَهْلَ الْمَدِينَةِ أَحَدٌ إِلاَّ انْمَاعَ كَمَا يَنْمَاعُ الْمِلْحُ فِي الْمَاءِ