In the interpretation of "liyudhhirahu 'ala al-din kullihi" ("that he may proclaim it over all religion") Banu Amin 2 says that there is no doubt that the pronoun hu refers to the Qur'an and the religion of Islam which means that Islam will prevail and reign over all the religions of the world. She adds that we can see that Islam has not yet reached the whole world but we know that the promise of God is the Truth, so a time must certainly come when Islam will dominate all the religions, and this can only be realised with the help of the Mahdi's reappearance from the Prophet's offspring, after which no one will remain unless he pronounces the declaration of faith in Islam (Shahada). She then reports from the Minhaj al-Sadiqin and from Ali ibn Ibrahim Qummi that the al-Qa'im from the
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2 Makhzan al-'lrfan, Vol. 5, p. 279
Prophet's offspring will complete the religion of God and will establish it and enable it to reign over all other world religions in such a way that, apart from God, nothing else will be worshipped, and this is the meaning of the Prophet's saying: "he will fill the earth with justice and equity as it was filled with oppression and tyranny."