مَنْ كَذَبَ عَلَيَّ مُتَعَمِّدًا، فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ
Translation: Whoever deliberately attributes a lie to me, let that person take their place in the Fire.
Source: البخاري
كَذَبَ عَلَيَّ means “attributed a lie to me.” The pronoun in عَلَيَّ refers to the Prophet ﷺ. مُتَعَمِّدًا describes deliberately doing so; grammatically it expresses the actor’s state (ḥāl). فَلْيَتَبَوَّأْ contains the lām of command, but here the expression functions as a severe warning, not a recommendation to do something.
The warning concerns knowingly inventing words and presenting them as Prophetic speech. An unintentional mistake is not the same as deliberate fabrication, yet a discovered misquotation must still be corrected.