BibTeX:
@incollection{Various,
  author = {Various},
  title = {A Prayer for the Widow of the King of Martyrs},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/love-god},
}

APA:
Various. A Prayer for the Widow of the King of Martyrs. In *bahaistories.com archive*.

MLA:
Various. "A Prayer for the Widow of the King of Martyrs." *bahaistories.com archive*, n.d..

Chicago:
Various. "A Prayer for the Widow of the King of Martyrs." In *bahaistories.com archive*, n.d..