وَإِذَا تُتۡلَىٰ عَلَيۡهِمۡ ءَايَاتُنَا بَيِّنَٰتٖ قَالَ ٱلَّذِينَ لَا يَرۡجُونَ لِقَآءَنَا ٱئۡتِ بِقُرۡءَانٍ غَيۡرِ هَٰذَآ أَوۡ بَدِّلۡهُۚ قُلۡ مَا يَكُونُ لِيٓ أَنۡ أُبَدِّلَهُۥ مِن تِلۡقَآيِٕ نَفۡسِيٓۖ إِنۡ أَتَّبِعُ إِلَّا مَا يُوحَىٰٓ إِلَيَّۖ إِنِّيٓ أَخَافُ إِنۡ عَصَيۡتُ رَبِّي عَذَابَ يَوۡمٍ عَظِيمٖ

Wa izaa tutlaa 'alaihim aayaatunaa baiyinaatin qaalal lazeena laa yarjoona liqaaa'a na'ti bi Qur'aanin ghairi haazaaa aw baddilh; qul maa yakoonu leee 'an 'ubaddilahoo min tilqaaa'i nafsee in attabi'u illaa maa yoohaaa ilaiya inneee akhaafu in 'asaytu Rabbee 'azaaba Yawmin 'Azeem

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)."

— Yunus (يُونُس), 10:15