question #3 Sahih Muslim 1, Introduction, Narration 1 : How does Islam view the act of fabricating statements attributed to the Prophet Muhammad (peace be upon him)?

Muhammad bin Ja’far narrated to us, Shu’bah narrated to us, on authority of Mansūr, on authority of Rab’iy ibn Hirāsh, that he heard Alī, may Allah be pleased with him, giving a Khutbah and he said that the Messenger of Allah, peace and blessings of Allah upon him, said: ‘Do not lie upon me; indeed whoever lies upon me will enter the Fire’.