Hadithcore
Sahih al-Bukhari, 1291
sahih

Narrated Al-Mughira:

I heard the Prophet (ﷺ) saying, "Ascribing false things to me is not like ascribing false things to anyone else. Whosoever tells a lie against me intentionally then surely let him occupy his seat in Hell-Fire." I heard the Prophet (ﷺ) saying, "The deceased who is wailed over is tortured for that wailing."

حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا سَعِيدُ بْنُ عُبَيْدٍ، عَنْ عَلِيِّ بْنِ رَبِيعَةَ، عَنِ الْمُغِيرَةِ ـ رضى الله عنه ـ قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏"‏ إِنَّ كَذِبًا عَلَىَّ لَيْسَ كَكَذِبٍ عَلَى أَحَدٍ، مَنْ كَذَبَ عَلَىَّ مُتَعَمِّدًا فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ ‏"‏‏.‏ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏"‏ مَنْ نِيحَ عَلَيْهِ يُعَذَّبُ بِمَا نِيحَ عَلَيْهِ ‏"‏‏.‏

References2 variants
In-Book Reference
Book 23, Hadith 49
USC-MSA web (English) reference
Vol. 2, Book 23, Hadith 378 (deprecated numbering scheme)