Sura Yūnus 10:15

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

wa-idhā tutlā ʿalayhim āyātunā bayyinātin qalā lladhīna lā yarjūna liqāʾanā iʾti bi-qurʾānin ghayri hādhā aw baddilhu qul mā yakūnu lī an ubaddilahu min tilqāʾi nafsī in attabiʿu illā mā yūḥā ilayya innī akhāfu in ʿaṣaytu rabbī ʿadhāba yawmin ʿaẓīmin

But when Our Clear Signs are rehearsed unto them, those who rest not their hope on their meeting with Us, Say: "Bring us a reading other than this, or change this," Say: "It is not for me, of my own accord, to change it: I follow naught but what is revealed unto me: if I were to disobey my Lord, I should myself fear the penalty of a Great Day (to come)."