An-Nahl 16:104

وَإِذَا بَدَّلْنَا آيَةً مَّكَانَ آيَةٍ ۙ وَاللَّهُ أَعْلَمُ بِمَا يُنَزِّلُ قَالُوا إِنَّمَا أَنتَ مُفْتَرٍ ۚ بَلْ أَكْثَرُهُمْ لَا يَعْلَمُونَ

And when We substitute a verse in place of a verse - and Allah is most knowing of what He sends down - they say, "You, [O Muhammad], are but an inventor [of lies]." But most of them do not know.

قُلْ نَزَّلَهُ رُوحُ الْقُدُسِ مِن رَّبِّكَ بِالْحَقِّ لِيُثَبِّتَ الَّذِينَ آمَنُوا وَهُدًى وَبُشْرَىٰ لِلْمُسْلِمِينَ

Say, [O Muhammad], "The Pure Spirit has brought it down from your Lord in truth to make firm those who believe and as guidance and good tidings to the Muslims."

وَلَقَدْ نَعْلَمُ أَنَّهُمْ يَقُولُونَ إِنَّمَا يُعَلِّمُهُ بَشَرٌ ۗ لِّسَانُ الَّذِي يُلْحِدُونَ إِلَيْهِ أَعْجَمِيٌّ وَهَـٰذَا لِسَانٌ عَرَبِيٌّ مُّبِينٌ

And We certainly know that they say, "It is only a human being who teaches the Prophet." The tongue of the one they refer to is foreign, and this Qur'an is [in] a clear Arabic language.

إِنَّمَا يَفْتَرِي الْكَذِبَ الَّذِينَ لَا يُؤْمِنُونَ بِآيَاتِ اللَّهِ ۖ وَأُولَـٰئِكَ هُمُ الْكَاذِبُونَ

They only invent falsehood who do not believe in the verses of Allah, and it is those who are the liars.

مَن كَفَرَ بِاللَّهِ مِن بَعْدِ إِيمَانِهِ إِلَّا مَنْ أُكْرِهَ وَقَلْبُهُ مُطْمَئِنٌّ بِالْإِيمَانِ وَلَـٰكِن مَّن شَرَحَ بِالْكُفْرِ صَدْرًا فَعَلَيْهِمْ غَضَبٌ مِّنَ اللَّهِ وَلَهُمْ عَذَابٌ عَظِيمٌ

Whoever disbelieves in Allah after his belief... except for one who is forced [to renounce his religion] while his heart is secure in faith. But those who [willingly] open their breasts to disbelief, upon them is wrath from Allah, and for them is a great punishment;

ذَٰلِكَ بِأَنَّهُمُ اسْتَحَبُّوا الْحَيَاةَ الدُّنْيَا عَلَى الْآخِرَةِ وَأَنَّ اللَّهَ لَا يَهْدِي الْقَوْمَ الْكَافِرِينَ

That is because they preferred the worldly life over the Hereafter and that Allah does not guide the disbelieving people.