From Sahih Muslim (Hadith 6483):
Jabir b. 'Abdullah reported Allah's Apostle (ﷺ) as saying one mouth before his death (or something like it):None amongst the created beings who had been living by that time (during the lifetime of Allah's Apostle).... 'Abd al-Rahman has interpreted these words of Allah's Apostle (ﷺ) as: The ages (of the people) would be diminished
Reference: Muslim 6483