Voice of a Nightingale,A poem organized by Al-Asma'i challenges the Abbasid Caliph Abu Jaafar Al-Mansour After being tight on poets he was memorizing the poem from the first time he heard it He claimed to have heard it before After He had a boy who memorized the poem after hearing it twice.He came to recount it after being recited by the poet and then by the caliph.He had a female slave who kept the poem from the third time.He came to recount it after the lad to confirm to the poet that the poem had been spoken by a poet .This was working with all the poets, and the poets were disappointed and frustrated, especially since the caliph had rewarded the poem that could not tell the weight of what was written on gold, and heard Asma'i said: "It is cunning and trick.".He prepared a poem of a variety of words and strange meanings and dressed in Arab clothes and deny that he was known to the prince entered the prince and said: I have a poem I would like to give you and do not think you heard before.Prince Hat said to him what you have, and he gave him a poem Voice of a Nightingale and after he finished saying the poem was not able to mention the caliph.Then he brought his boy, and he did not remember anything either because he memorized it twice after narrating it ,Then the female slave is the other she did not remember anything,The Caliph said to him: I will give you the weight of the writing board in gold. To write it?Al-Asma'i said to him: I inherited a marble column from my father and the poem is inscribed on it.This column on my camel abroad carried by ten soldiers.They brought him and the weight of the whole box.The minister said: "O Commander of the Faithful, what I think only Asmai.The prince said: Remove to Thamk O Arabi. He removed Alaarabi to Thame if Alasma'i.Do you do this, Prince of the Faithful, O Asmae ?!