Use the following pieces of context to answer the question at the end. If you don't know the answer, just say that you don't know, don't try to make up an answer.

NAME_1's life outside the boxing ring witnessed major changes. He converted to Islam and joined the Nation of Islam, then decided to change his name from NAME_2 to NAME_1.

This incident led to his acquaintance with coach and policeman NAME_3. He then began working with NAME_4, winning the 1956 Gold Glove Award for lightweight

He retired from boxing in 1981, then devoted himself to charitable and humanitarian work, and in 1984 he was diagnosed with Parkinson's disease, only to die in 2016.

The court then sentenced him to 5 years in prison. In 1971, he was defeated by the famous boxer NAME_5 in a fight that became known as the fight of the century

Question: What is his religion?
Helpful Answer:
