Sahih al-Bukhari, Volume 1, Book 3, Hadith 109 (USC-MSA) ⓘ
Narrated Salama: I heard the Prophet saying, "Whoever (intentionally) ascribes to me what I have not said then (surely) let him occupy his seat in Hell-fire."
حَدَّثَنَا مَكِّيُّ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَزِيدُ بْنُ أَبِي عُبَيْدٍ، عَنْ سَلَمَةَ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " مَنْ يَقُلْ عَلَىَّ مَا لَمْ أَقُلْ فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ " .
also referenced under: Book 3, Hadith 51 (In-Book) & Hadith 109 (DarusSalam)