ABU UBAIDA (Memar ibn ul-Muthannal) (728-825), Arabian scholar, was born a slave of Jewish-Persian parents in Basra. In 803 he was called to Baghdad by Harlan al-Rashid. He died in Basra. He was one of the most learned and authoritative scholars of his time in the Arabic language, antiquities and stories. The titles of 105 of his works are mentioned in the Fihrist, and his Book of Days is the basis of parts of the history of ibn al-Athir and of the Book of Songs, but nothing of his (except a song) seems to exist now in an independent form.