‘Tell me about that which is not of Allah, that which Allah does not have, and that which Allah does not know!’

Imam al-Hadi (a.s.) said, “Once, a Jew came to Ameerul Mo'minin (a.s.) and said to him, ‘Tell me about that which is not of Allah, that which Allah does not have, and that which Allah does not know!’
Imam Ali (a.s.) said, ‘What Allah does not know is that He does not know (accept) that He has a child. This refutes your (the Jews’) saying that Uzayr is the son of Allah. As for that which is not of Allah, it is injustice because there is no injustice with Allah against His people. And as for your saying about that which Allah does not have, it is that Allah has no partner.’
The Jew was astonished and turned Muslim. He declared the shahada and then said to Imam Ali (a.s.), ‘I bear witness that you are the truth, from the people of truth, and have said the truth. ( Ma’athir al-Kubara’.)