A verse from pre-islamic [Bedouin] Arabian poet Tufail b. ‘Awf al-Ghanawi (died ca. 610), know as Tufail al-Khail [Tufail of the horses] for the emphasis on horses in his poetry, from Abu Ubaida’s “Book of Horses” [translation mine]: Horses the likes of wolves, so well-protected, for they are the pick of what’s left of [the bloodlines] of al-Ghurab and Mudh-hab Al-Ghurab and Mudh-had are two famous steeds from these ancient times. Their offspring had become rare, at least within Tufail’s tribe, and they were treasured and well-guarded for that reason.