Origin story
Sai Baba arrived as a young ascetic at Shirdi and stayed for decades, living in a ruined mosque and radiating love to Hindus and Muslims alike. He performed no public miracles for display, but devotees remember healings, rescued children and the mysterious materialisation of sacred ash.
His teaching was simple: surrender to the guru, see the divine in every person and give up distinctions of religion and caste. The dhuni fire he kept burning, the two lamps of Shirdi and his padukas mark the unity of traditions and the warmth of grace.
Source: Wikipedia: Sai Baba of Shirdi — https://en.wikipedia.org/wiki/Sai_Baba_of_Shirdi