إِنَّمَا يَفۡتَرِي ٱلۡكَذِبَ ٱلَّذِينَ لَا يُؤۡمِنُونَ بِـَٔايَٰتِ ٱللَّهِۖ وَأُوْلَٰٓئِكَ هُمُ ٱلۡكَٰذِبُونَ ١٠٥
They only invent falsehood who do not believe in the verses of Allāh, and it is those who are the liars.
Translation: Saheeh International (English)
Each word's meaning and sound
Muhammad (peace be upon him) is not lying about what he brought from His Lord. Lies are only being invented by those who do not accept Allah’s words, because they do not fear any punishment nor have hope of any reward. Those described with the attribute of disbelief are the liars as lying is a habit that they are accustomed to.
Al-Mukhtasar in interpreting the Noble Quran