Muhammad Abduh Mughawiri
Source: Stories of Repentance
When al-Mansur bin ‘Ammar, may Allah have mercy on him, once entered the court of Abdul-Malik bin Marwaan, the latter said, “O Mansur, I have a question for you, and I will give you respite for an entire year to answer it: Who is the wisest of people, and who is the most ignorant of people?”
Al-Mansur left the castle and spent some time in contemplation in a nearby courtyard.
Then the answer came to him, and so he quickly hurried back to Abdul-Malik. “O Mansur, why have you returned?” asked Abdul Malik.