It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: The earth will be filled with oppression and injustice, then a man from my Ahl al-Bayt will emerge, and he will fill the earth with justice and fairness just as it was previously filled with oppression and injustice, and he will remain for seven or nine years.