Al-Mamoon Rebukes al-Maroozi for Fumbling About

But Sulayman kept fumbling about in his answers to the Imam's questions after the Imam had closed before him all avenues of his argument, and al-Mamoon was quick to notice his fumbling about which indicated Sulayman's loss, so he rebuked him and criticized him. It is reported that during the debate, when al-Rida (A.S.) asked him to continue his questions, he said, "Will is one of His attributes." The Imam said, "How many times has it been said that it is one of His attributes, so is it a new attribute, or has it always been so?" Sulayman said, "New." The Imam (A.S.) said, "Allahu Akbar! You are telling me that His attribute is new! Had it been one of His attributes, and an eternal one, then He willed and He created as long as His will and His creation are eternal...! This means it is an attribute of someone who did not know what he did! God is Elevated above this..." Sulayman said, "Things are not a will, and He did not will anything." Here the Imam said, "You have hissed, O Sulayman! He did and He created as long as His will and His creation are eternal...?! This is the attribute of someone who does not know what he did! Elevated is God above all of that." Sulayman, turning to al-Mamoon, then said, "Master! I have already informed him that it is like hearing and seeing and knowing." Al-Mamoon said, "Woe unto you, Sulayman! How you have erred and how often you have repeated yourself! Stop it and take another route, for you seem to be unable to provide any answer better than that." 

The debate continues after that till Sulayman's tongue is tied, whereupon al-Mamoon says, "O Sulayman! This is the most learned descendant of Hashim," and the session disperses.

Adapted from: "Imam al-Ridha (a.s.), A Historical and Biographical Research" by: "Muhammad Jawad Fadlallah"