Musnad Ahmad 626:51

Muhammad ibn Ja'far and Bahz narrated to us, they said: Shu'bah narrated to us, from Habib ibn Abi Thabit. Ibn Ja'far said: He said: I heard Maymun ibn Abi Shabib narrating from al-Mughirah ibn Shu'bah, from the Prophet, may Allah bless him and grant him peace, that he said: "Whoever narrates a hadith from me while he considers it to be a lie, then he is one of the liars."