Khalid and Ibrahim
were the two men in ar-Raqqah who received the Necronomicon from Hafez ibn Abd-al-Rahim. They invited him to stay and watch as they cast a spell to attack the United States. While the two took precautions by creating a pentagram and several circles on the floor, during the course of the enchantment, each mistranslated the Arabic, using the wrong verb tense. While the two traded insults, some invisible hand erased part of each circle. Slime and tentacles overwhelmed Khalid and Ibrahim. Hafez turned to flee, but was also engulfed by slime and tentacles.
↑Tales from the Miskatonic University Library, loc. 1020.