A narrative of karāma (saintly miracle) embedded in Islamic hagiographies is the only access to a miraculous event to which some witnesses have testified. I see these karāma narratives as representing living heritage, passed down from generation to generation, undergoing evolution on its generational descent. That is, through a process of natural selection, those features of the narrative that brought benefits, power, and survival of the society grow stronger while the more idle parts fade away. I investigate these narratives and the sociological function they served in broader Medieval Muslim societies. When karāma was considered an indication of a Shaikh’s veracity, a Shaikh with more karāma, I argue, was Shaikh-er. Consequently, devotees and descendants who were living by their karāmāt-owning Sheikh had a worthy cause to narrate their Shaikh’s karāmāt. They recorded, preserved, and remembered narratives that were beneficial for them and meaningful through their relationship to the social context. According to the tradition of Hadith transmission, they became part of the I-heard-one-said-that-another-said chain, i.e., their names were recorded along with the name of the Shaikh. The more credit they gave to their Sheikh, I claim, the more credit they gained, and this process evolves a narrative