Surah Al-Araf, verse 203

وَإِذَا لَمْ تَأْتِهِم بِـَٔايَةٍ قَالُوا۟ لَوْلَا ٱجْتَبَيْتَهَا ۚ قُلْ إِنَّمَآ أَتَّبِعُ مَا يُوحَىٰٓ إِلَىَّ مِن رَّبِّى ۚ هَـٰذَا بَصَآئِرُ مِن رَّبِّكُمْ وَهُدًى وَرَحْمَةٌ لِّقَوْمٍ يُؤْمِنُونَ ﴿٢٠٣﴾

7:203 When you do not bring them a sign, they say, “Why do you not improvise one?” Say, “I only follow what is revealed to me from my Lord. This [Qur’an] is an insight from your Lord, and a guidance and mercy for people who believe.”