The only substantial Islamic account of the battle is that found in the seventeenth-century historian al-Maqqari, based primarily on the medieval Spanish tradition. He adds that Almanzor ordered a large contingent of North African troops to join with those of Toledo for the campaign. He proceeded to devastate the Ribera del Duero before heading deeper into Castile. He was surprised by a Christian army in his camp near the castle called "The Eagles" (Las Águilas). He fell ill shortly after his defeat, perhaps from wounds received at the battle, but he continued to fight against Castile until he was being carried about on a litter. He was brought to Medinaceli, but the physicians were unable to diagnose his infirmity. He called his son, Abd al-Malik al-Muzaffar, to his bedside to give him instructions, but when he fled his father's tent in tears the dying general uttered the prophetic words, "This appears to me the first sign of the decadence that awaits the empire."
