"امام معصوم" refers to the concept of an infallible Imam in Islam, particularly within Shia belief. These Imams are considered to be divinely appointed leaders who possess complete knowledge and are free from sin. They guide the community in spiritual and moral matters, serving as role models for their followers. The Twelve Imams are the most recognized group of infallible leaders in Shia Islam. Each Imam is believed to be a direct descendant of the Prophet Muhammad through his daughter Fatimah and son-in-law Ali. The last Imam, known as Imam Mahdi, is believed to be in occultation and will return to bring justice.