Musnad Abu Ya'la al-Mawsili 159:136

Abu al-Rabi' narrated to us, Abdullah bin Yazid narrated to us, Sa'id bin Abi Ayyub narrated to us, Abu Hani' al-Khawlani, Humayd bin Hani', narrated to us, from Abu Uthman Muslim bin Yasar, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There will be in the end of time people from my nation who will narrate to you what neither you nor your fathers have heard. So beware of them, and let them beware of you."