Explanation of the opponents of Jarir and Al -Farazdaq a book for the news of the Arabs in the pre -Islamic era before Islam, which is the most famous literature of Abu Ubaidah Muammar bin Al -Muthanna, which means mentioning the verses of the two poets Al -Farazdaq and Jarir and explained them and mentioned the oppositions between them. The genealogy of the Arabs and its news in ignorance and Islam, in which Abu Ubaidah mentioned many of the Arab knowledge and social Sunnah before Islam, and explained their likes and customs.