Musannaf Ibn Abi Shaybah 27926 — Deliberately lying about the Prophet

Muslim, the freedman of Sayyiduna Khalid bin Urfutah (may Allah be pleased with him), said that Sayyiduna Khalid bin Urfutah mentioned al-Mukhtar and said: "He is a kadhdhab (liar). And I heard the Messenger of Allah (peace and blessings be upon him) say: 'Whoever deliberately attributes a false statement to me, let him make his abode in Hell.'"