BibTeX:
@incollection{Various,
  author = {Various},
  title = {Rizwanea’s Day of Prayer},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/gratitude},
}

APA:
Various. Rizwanea’s Day of Prayer. In *bahaistories.com archive*.

MLA:
Various. "Rizwanea’s Day of Prayer." *bahaistories.com archive*, n.d..

Chicago:
Various. "Rizwanea’s Day of Prayer." In *bahaistories.com archive*, n.d..