Raj'a
Rajʿa (Arabic: رجعة, lit. 'return'), also known as ḥashr khāṣṣ (lit. 'specific resurrection'), is a doctrine in Shia Islam positing that some of the dead will return to life before the Resurrection to avenge their oppression. In Twelver Shia doctrine, the concept of rajʿa is closely intertwined with the eschatological concept of occultation (ghayba) and the reappearance of the Twelfth Imam Muhammad al-Mahdi in the end times to establish peace and justice on earth.