It was narrated from Abdullah bin Mas'ud that the Prophet P.B.U.H said: "Among those in charge of you, after I am gone, will be men who extinguish the Sunnah. and follow innovation. They will delay the prayer from its proper time." I said: "0 Messenger of Allah, if I live to see them, what should I do?" He said: "You ask me, a Ibn Umm 'Abd, what you should do? There is no obedience to one who disobeys Allah." (Hasan)