mentally retarded (noun)

1. In Greek mythology, there is a famous story of a mentally retarded hero named Heracles who performed incredible feats.

2. The novel 'Of Mice and Men' by John Steinbeck portrays the friendship between two mentally retarded characters, George and Lennie.

3. Some religious texts emphasize the importance of treating mentally retarded individuals with kindness and respect.

4. The painting titled 'The Idiot' by Russian artist Ivan Nikolaevich Kramskoy portrays a mentally retarded man in a thought-provoking manner.