عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((اتَّقُوا الْحَدِيثَ عَنِّي إِلَّا مَا عَلِمْتُمْ، فَإِنَّهُ مَنْ كَذَبَ عَلَيَّ مُتَعَمِّدًا فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ)) (مسند أحمد: 2974)
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Refrain from narrating hadiths from me, except those which you have knowledge of. For indeed, whoever deliberately lies about me, let him prepare his abode in the Hellfire."