Al-A'raf 7:203

Wa-itha lam ta/tihim bi-ayatinqaloo lawla ijtabaytaha qul innamaattabiAAu ma yooha ilayya min rabbee hathabasa-iru min rabbikum wahudan warahmatun liqawminyu/minoon

And when you, [O Muḥammad], do not bring them a sign [i.e., miracle], they say, "Why have you not contrived it?" Say, "I only follow what is revealed to me from my Lord. This [Qur’ān] is enlightenment from your Lord and guidance and mercy for a people who believe."

When you do not bring them a sign, they say, “Could you not make up one?”Say, “I only follow what is revealed to me from my Lord.” This is (a Book of) insights from your Lord and a guidance and mercy for a people who believe.