Belief in the coming of Hazrat Mahdi (pbuh)—Mashiach (Messiah) as Jews call him—is one of Judaism's fundamental beliefs. Ever since the 12th century, the Jews have regarded Rabbi Maimonides (or in Arabic, Ibn Maimun) as one of the greatest scholars of the Torah. Maimonides stated that of the 13th fundamental principles of Judaism, the 12th was "to believe in the coming of the Messiah [Hazrat Mahdi (pbuh)]." According to these principles, Jewish belief regarding Hazrat Mahdi (pbuh) is set out as follows:
"I sincerely believe in the coming of the Messiah [Hazrat Mahdi (pbuh)], and even if his coming is delayed, I await his coming every day."
The Mishnah, the authorized explanation of the Judaic scriptures, describes the position of those who deny the coming of the Messiah—that is, of Hazrat Mahdi (pbuh):
Whoever does not believe in him, or does not await his coming, denies not only [the statements of] the other Prophets, but also [those of] the Torah and of Moshe (Moses [pbuh]), our teacher... (Maimonides, Mishnah Torah, Laws of Kings 11:1)
In addition, the Shmoneh Esrei prayer, which Jews perform three times every day, also includes the prayer for the coming of Hazrat Mahdi (pbuh) to be close at hand. They recite this prayer in the expectation of Hazrat Mahdi (pbuh), for the restoration of justice as a requirement of religious moral values, for immorality, sin and evil to come to an end, and for the truth to prevail. This section contains those parts of the Torah that concern Hazrat Mahdi (pbuh) and that agree with the verses of the Qur'an and the hadiths of our Prophet (may Allah bless him and grant him peace).