The Book of the Sunnah
0/4. Chapter:
Severe condemnation of deliberately telling lies against the Messenger of Allah (saws)
Sunan Ibn Majah
حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ الْمِصْرِيُّ، حَدَّثَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " مَنْ كَذَبَ عَلَىَّ - حَسِبْتُهُ قَالَ مُتَعَمِّدًا - فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ " .
It was narrated that Anas bin Malik said: "The Messenger of Allah (ﷺ) said: 'Whoever tells lies about me', I (the narrator) think that he also said 'deliberately', let him take his place in Hell.'"
Reference : Sunan Ibn Majah 32In-book reference : Introduction, Hadith 0English translation : Vol. 1, Book 1, Hadith 32