19. My father said: `Ali ibn Ibrahim ibn Hashim said, on the authority of his father, on the authority of Ibn Abu `Umayr, on the authority of `Abd Allah ibn Bukayr, on the authority of Zurarah, that Abu `Abd Allah al-Sadiq said: “Verily, there was once a great king started to discuss the Essence of the Lord, Blessed and Exalted be He. As a result, he went missing, and it is not know what became of him.