Musnad Abu Ya'la al-Mawsili 115:68

Al-Qawariri and Musa ibn Muhammad ibn Hayyan narrated to us, they said: Harami ibn 'Umarah narrated to us, from Shu'bah, from Qatadah, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever lies about me intentionally, let him take his seat in the Fire." There is no mention of "intentionally" (mut'ammidan) in the hadith of Musa.