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Al-Musta'li's regnal name was al-Mustaʿlī biʾllāh, which means "the one who seeks refuge in God." This name reflects his belief in the importance of divine guidance and protection. Al-Musta'li was the sixth Fatimid caliph, ruling from 1094 to 1101. During his reign, he faced significant challenges, including internal revolts and external threats from the Seljuk Turks.