question #1 Sahih Muslim 4 a, Introduction, Narration 4 : What are the consequences of intentionally lying about the Prophet Muhammad (peace be upon him)?

‘I arrived at the Masjid and al-Mughīrah, the Amīr of al-Kūfah said: ‘I heard the Messenger of Allah, peace and blessings of Allah upon him, saying, ‘Indeed a lie upon me is not like a lie upon anyone else, for whoever lies upon me intentionally, then he shall take his seat in the Fire’.’