Sai Baba of Shirdi, also known as Shirdi Sai Baba, was an Indian spiritual master and fakir who lived from around 1838 to 1918. He is considered a saint and is revered by both Hindu and Muslim devotees. Sai Baba preached the importance of self-realization, love, forgiveness, charity, contentment, and devotion to God and Guru. He condemned discrimination based on religion or caste. Sai Baba's teachings combined elements of Hinduism and Islam. He is believed to be an avatar of the Hindu god Dattatreya. Sai Baba's biography is primarily documented in the book "Shri Sai Satcharitra" written by his disciple Hemadpant. He spent most of his life in Shirdi, where he performed miracles, attracted a following, and passed away in 1918. His remains were interred at the Shirdi Sai Baba Temple, also known as Shree Samadhi Mandir.

Sai Baba of Shirdi was a spiritual teacher who promoted religious tolerance and advocated for the unity of all religions. He encouraged his followers to pray, chant God's name, and read holy scriptures from different traditions. He emphasized the importance of leading a moral life, helping others, and developing faith and patience. Sai Baba observed practices from both Hinduism and Islam, and his teachings were influenced by Bhakti Yoga, Jnana Yoga, and Karma Yoga. He encouraged charity and the sharing of resources. The Sai Baba Temple in Shirdi is a major pilgrimage site, and his followers can be found in various parts of the world. Sai Baba is revered by Hindus, Muslims, Parsis, and people of other faiths. His devotees believe that he performed miracles and appeared in different forms to fulfill the spiritual needs of his followers. Temples dedicated to Sai Baba can be found in many countries, and he is depicted in various forms of sacred art and architecture. In 2008, India Post issued a commemorative postage stamp to honor Sai Baba.