Musnad Ahmad 333:32

Yahya ibn Sa'id narrated to us, from Yazid ibn Abi 'Ubayd, who said: Salamah ibn al-Akwa' narrated to us, saying: The Messenger of Allah (peace and blessings of Allah be upon him) said: "No one shall say about me a falsehood, or that which I did not say, except that he shall take his seat in the Fire."