Sai Baba is worshipped by people around the world. He had no love for perishable things and his sole concern was realization of the self. He taught a moral code of love, forgiveness, helping others, charity, contentment, inner peace, and devotion to God and guru. He gave no distinction based on religion or caste. Sai Baba's teaching combined elements of Hinduism and Islam: he gave the Hindu name Dwarakamayi to the mosque in which he lived, practised Muslim rituals, taught using words and figures that drew from both traditions, and was buried in Shirdi. One of his well known epigrams, "Sabka Malik Ek" ("One God governs all"), is associated with Hinduism, Islam and Sufism. He also said, "Trust in me and your prayer shall be answered". He always uttered "Allah Malik" ("God is King").
Sources & References: https://en.wikipedia.org/wiki/Sai_Baba_of_Shirdi