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."
And remember your Lord within yourself in humility and in fear without being apparent in speech - in the mornings and the evenings. And do not be among the heedless.