It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The millstone of Islam will turn in the thirty-fifth year. If they perish, then it is the way of those who perished; and if they survive, they will remain for seventy years."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10273