Sayyiduna Ali (may Allah be pleased with him) says that the Noble Prophet (peace and blessings of Allah be upon him) said: "Do not ever lie upon me, for whoever lies upon me should make his abode in the Hellfire."
Sayyiduna Salamah bin Akwa’ (may Allah be pleased with him) says: I heard the Prophet Muhammad (peace and blessings be upon him) say: “Whoever attributes to me something which I have not said, then he should find his abode in the Fire.”
Narrated by Sayyiduna Abu Huraira (may Allah be pleased with him) from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) said: "Keep my name, but do not keep my kunyah (my title, which is Abu al-Qasim) during my lifetime. And (be certain that) whoever sees me in a dream has indeed seen me, because Satan cannot assume my form, cannot take my appearance. And whoever deliberately lies about me should find his place in the Fire."