Musnad Ahmad 30:3081

Muhammad ibn Ja'far narrated to us, he said: Shu'bah narrated to us, from Abu Bishr, from Abdullah ibn Shaqiq, from Abu Hurairah, 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 Hurairah 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."