Musnad Ahmad 30:2195

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Abu Bishr, from ‘Abdullah ibn Shaqiq, from Abu Hurayrah, from the Prophet (peace and blessings of Allah be upon him), that he said: "The best of you is my generation, then those who follow them." Abu Hurayrah said: "I do not know if he mentioned two or three times." "Then there will come after them a people who love obesity, and they will bear witness without being asked to bear witness."