It is narrated from Sayyiduna Abdullah (may Allah be pleased with him) that he said: "Soon there will be rulers who will abandon this little (a small part) of the Sunnah; if you put up with that, they will increase it; then if you put up with that as well, they will bring the greatest calamity."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9464