BibTeX:
@incollection{Various,
  author = {Various},
  title = {Somebody had given Him [‘Abdu’l-Bahá] a big cake},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/generosity},
}

APA:
Various. Somebody had given Him [‘Abdu’l-Bahá] a big cake. In *bahaistories.com archive*.

MLA:
Various. "Somebody had given Him [‘Abdu’l-Bahá] a big cake." *bahaistories.com archive*, n.d..

Chicago:
Various. "Somebody had given Him [‘Abdu’l-Bahá] a big cake." In *bahaistories.com archive*, n.d..