Musnad Abu Ya'la al-Mawsili 248:35

Ishaq narrated to us, al-Nadr ibn Shumayl narrated to us, Shu'bah narrated to us, from Simak, who said: I heard Jabir ibn Samurah say: I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: "Indeed, before the Hour, there will be liars." Simak said: My father said to me: "So beware of them."