Sa'id ibn al-Musayyib سعيد بن المسيب بن حزن أبو محمد القرشي · The Promised Deliverer (Kitab Al-Mahdi)

The Prophet (ﷺ) said: If only one day of this time (world) remained, Allah would raise up a man from my family who would fill this earth with justice as it has been filled with oppression.