BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mullá Husayn's Scroll for Bahá'u'lláh},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2019/11/the-story-of-how-mulla-husayn-was-able.html},
}

APA:
Various. Mullá Husayn's Scroll for Bahá'u'lláh. In *Baha'i Stories Blog*.

MLA:
Various. "Mullá Husayn's Scroll for Bahá'u'lláh." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Mullá Husayn's Scroll for Bahá'u'lláh." In *Baha'i Stories Blog*, n.d..