The Prophet (ﷺ) said: The Mahdi will be of my family, of the descendants of Fatimah. Abdullah ibn Ja'far said: I heard AbulMalih praising Ali ibn Nufayl and describing his good qualities.
Sunan Abi Dawud Book 38, Hadith 6
← Previous Hadith 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.

Sunan Abi Dawud Book 38, Hadith 5 Next Hadith → The Prophet (ﷺ) said: The Mahdi will be of my stock, and will have a broad forehead a prominent nose. He will fill the earth will equity and justice as it was filled with oppression and tyranny, and he will rule for seven years.

Sunan Abi Dawud Book 38, Hadith 7