BibTeX:
@incollection{Various,
  author = {Various},
  title = {How Mulla Husayn received his famous sword},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2017/06/how-mulla-husayn-received-his-famous.html},
}

APA:
Various. How Mulla Husayn received his famous sword. In *Baha'i Stories Blog*.

MLA:
Various. "How Mulla Husayn received his famous sword." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "How Mulla Husayn received his famous sword." In *Baha'i Stories Blog*, n.d..