Yunus 15

وَإِذَا تُتْلَىٰ عَلَيْهِمْ ءَايَاتُنَا بَيِّنَٰتٍ قَالَ ٱلَّذِينَ لَا يَرْجُونَ لِقَآءَنَا ٱئْتِ بِقُرْءَانٍ غَيْرِ هَٰذَآ أَوْ بَدِّلْهُ قُلْ مَا يَكُونُ لِىٓ أَنْ أُبَدِّلَهُۥ مِن تِلْقَآئِ نَفْسِىٓ إِنْ أَتَّبِعُ إِلَّا مَا يُوحَىٰٓ إِلَىَّ إِنِّىٓ أَخَافُ إِنْ عَصَيْتُ رَبِّى عَذَابَ يَوْمٍ عَظِيمٍ ﴿١٥﴾

Waitha tutla AAalayhim ayatuna bayyinatin qala allatheena la yarjoona liqaana iti biquranin ghayri hatha aw baddilhu qul ma yakoonu lee an obaddilahu min tilqai nafsee in attabiAAu illa ma yooha ilayya innee akhafu in AAasaytu rabbee AAathaba yawmin AAatheemin

And when Our Clear Verses are recited unto them, those who hope not for their meeting with Us, say: Bring us a Quran other than this, or change it."Say (O Muhammad SAW): "It is not for me to change it on my own accord; I only follow that which is revealed unto me. Verily, I fear if I were to disobey my Lord, the torment of the Great Day (i.e. the Day of Resurrection)." The Noble Quran