The arrival of Hazrat Imam Mahdi and the revolution started by him!!SourceOn the authority of Hazrat Abu Saeed al-Khudri, may Allah be pleased with him, the Messenger of Allah, may Allah bless him and grant him peace, said: (In the last days) my Ummah will suffer severe hardships from their rulers until the vast land of Allah is given to them. At that time, Allah Almighty will raise up a person from my generation, and his struggle will cause such a revolution that the way Allah's earth was filled with oppression and oppression, in the same way, the heavens will be filled with justice and fairness. and the inhabitants of the earth will also agree, the earth will not retain the seed that is planted in the earth, but the plant that should grow from it will grow (not even a grain of seed will be wasted) and In the same way, the sky will store the raindrops, but will rain them down (i.e. there will be abundant rains according to the need) and this male Mujahid will live for seven years, eight years or nine years among the people.