Allah refers to the end times and Hazrat Mahdi (as) in Surat an-Nasr, verses 1-3

When Allah’s help and victory have arrived and you have seen people entering Allah’s religion in droves, then glorify your Lord’s praise and ask His forgiveness. He is the Ever-Returning. (Surat an-Nasr, 1-3)

1.

When Allah's help and victory have arrived ...

In this section of the verse, Allah imparts the glad tidings that He will send help and victory for the dominion of the moral values of the religion, for the difficulties and hardships faced by Muslims to come to an end and for the world to attain peace. With the mission of our Prophet (saas), believers in Allah have been freed from the dominion in society of pagan and all kinds of irreligious ideologies. Islam spread through the Arabian Peninsula, and then continued spreading both to the East and to the West. 

Our Prophet (saas) has revealed in the hadith that through Hazrat Mahdi (as) the moral values of the religion will rule the whole world in the End Times. In this respect, the verse refers to Hazrat Mahdi (as). Because we are told in the hadith that Hazrat Mahdi (as) will conquer the whole world, on the intellectual plane, that he will neutralize all irreligious movements in the world and will be instrumental in the emergence of a morally virtuous society made up of believers in Allah.

“Hazrat Mahdi (as) is one of my children... He will unearth buried treasures and conquer the lands of polytheism.”  (Signs of the Awaited Mahdi, Ahmad Ibn Hajar al-Makki (Haytami), p. 26)

The Judgment Day  will not take place until I fight with volumes of books. People chosen from among the believers, who fight on the path of Allah and are not swayed by criticism or reproof, will come to the Hejaz road to right them, and they will capture Constantinople and Rumiyya (Rome) by reciting the name of Allah and the takbir...” (Ibn Majah and Haqim.)

Hazrat Mahdi (as) will conquer Rumiyya with four taqbir...... (Signs of the Awaited Mahdi, Ahmet Ibn Hajar al-Makki (Haytami), p. 32)

Hazrat Mahdi (as) will appear in Mecca in the late evening, together with the banner, robe and many signs of our Prophet (saas). He is radiant, and has witnesses with him... He will then conquer Hejaz...and will then send this army to various places in order to conquer the world.  (Signs of the Awaited Mahdi, Ahmad ibn Hajar al-Makki (Haytami)

2.

“...and you have seen people entering Allah's religion in droves ...”

Islam did indeed spread right across the Arabian Peninsula in the time of our Prophet (saas). The spread of Islam also continued in the times after our Prophet (saas). People continued converting to Islam in the time of the four caliphs. But the verse also refers, in another sense, to Islam spreading across the world, by way of Hazrat Mahdi (as), and to there being a rapid rise in the number of Muslims in his times. As we know, Hazrat Mahdi (as) will have three tasks. Master Said Nursi says that the most important of these is to be instrumental in people coming to faith by demolishing the intellectual system behind all philosophies that deny the existence of Allah, such as Darwinism and materialism:

FIRST: Under the effect of SCIENCE AND PHILOSOPHY, and the contagious plague known as ATHEISM AND MATERIALISM, and its spread among people, he will first of all save the faith in such a way as to silence PHILISOPHY AND MATERIALISM. (Emirdağ Addendum, p. 259)

THE MOST IMPORTANT OF THE THREE TASKS OF THE PERSON WHO WILL COME IN THE END TIMES and is awaited by the Ummah, AND THE GREATEST AND THE MOST VALUABLE, IS TO SPREAD TRUE FAITH BY HIS WRITINGS AND THE DISSEMINATION THEREOF AND TO FREE BELIEVERS FROM HERESY. ... (The Seal of the Unseen Universe, p. 9)

3.

... then glorify your Lord’s praise and ask His forgiveness....

Allah commands our Prophet (saas) and all believers to give thanks to Him when they see such a great victory and the growth of faith. Those who witness the great global dominion of Islam in the End Times, through the Prophet Jesus (as) and Hazrat Mahdi (as) will realize when they see the complete defeat of atheism, communism, Darwinism, materialism and all other irreligious movements, that this is the help and victory promised by Allah.

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