Hazrat Ibn Sirin narrates that Hazrat Umar received news that a man in Basra was preaching and giving admonition through storytelling. So he wrote a letter to him: Alif Lam Ra, these are the verses of a clear Book. We have revealed the Qur'an in Arabic so that you may understand. We relate to you the best of stories. The narrator says that the man understood and abandoned storytelling.