سورة Al-A'raf (The Heights ) - الآية 203

And if you do not bring them a miracle [according to their (i.e. Quraish-pagans') proposal], they say: \"Why have you not brought it?\" Say: \"I but follow what is revealed to me from my Lord. This (the Quran) is nothing but evidences from your Lord, and a guidance and a mercy for a people who believe.\"