Ibne-'Abbas Radiyallahu 'anhuma narrates that Rasullullah Sallallahu 'alaihi wasallam said: Avoid relating a Hadith from me, unless you know it for a certainty. He who deliberately narrates from me falsely, then let him prepare for himself an abode in the Hell-Fire. And he who interprets the Qur'an according to his own opinion, then let him prepare for himself an abode in the Hell-Fire. (Tirmidhi: 2951)