Read Surah Yunus 10:15: "AND [thus it is:] whenever Our messages are conveyed unto them in all their clarity, those who do not believe that they ..." Full Arabic text, English translation, and image generator.
وَإِذَا تُتْلَىٰ عَلَيْهِمْ آيَاتُنَا بَيِّنَاتٍ ۙ قَالَ الَّذِينَ لَا يَرْجُونَ لِقَاءَنَا ائْتِ بِقُرْآنٍ غَيْرِ هَٰذَا أَوْ بَدِّلْهُ ۚ قُلْ مَا يَكُونُ لِي أَنْ أُبَدِّلَهُ مِنْ تِلْقَاءِ نَفْسِي ۖ إِنْ أَتَّبِعُ إِلَّا مَا يُوحَىٰ إِلَيَّ ۖ إِنِّي أَخَافُ إِنْ عَصَيْتُ رَبِّي عَذَابَ يَوْمٍ عَظِيمٍ
AND [thus it is:] whenever Our messages are conveyed unto them in all their clarity, those who do not believe that they are destined to meet Us [are wont to] say, "Bring us a discourse other than this, or alter this one.” Say [O Prophet]: "It is not conceivable that I should alter it of my own volition; I only follow what is revealed to me. Behold, I would dread, were I [thus] to rebel against my Sustainer, the suffering [which would befall me] on that awesome Day [of Judgment]!"