This verse concerns the reign of Islam over all the religions, and Shaykh Tabarsi reports several views and traditions which interpret the verse as a prediction of the return of Jesus and the reappearance of the Mahdi.
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1- Shaykh Tabarsi 1 reports from Dhahhak that the expression "liyuzhirahu `ala al-din kullihi" ("to proclaim it over all religion") refers to the time of the descent of `Isa ibn Maryam on the earth when the followers of all religions will become Muslims.
2- He then reports a tradition from Imam Baqir (fifth Imam) that this event will occur during the time of the reappearance of the Mahdi from the progeny of the Prophet when there will be no one left on the earth who did not accept the message of the Prophet Muhammad. 2
3- The author also reports from Kalbi that there will be no religion left in the world unless Islam is victorious over it; this event is certain and the Day of Judgement will not occur until it takes place.
4- He reports from Miqdad ibn Aswad who said: "I heard from the Prophet who said: 'There will be no house left in the world unless the word of Islam enters this house either with dignity or by force." 3
5- It is also reported from ibn 'Abbas, says the author, that the pronoun hu in "liyuzhirahu `ala al-din kullihi" refers to the Prophet, which means that God will teach him all the religions
1 Majma' al-Bayan, Vol. I I p. 73
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so that nothing from the world's religions will remain outside the Prophet's knowledge.