"Heike Nokyo" is a general term representing the Buddhist scriptures donated to Itsukushima-jinja Shrine by Heike (Taira family [the same character is read Hei or Taira depending on the context]) with prayer for prosperity of the greater Taira family including Ise-Heishi.
『平家納経』（へいけのうきょう）は、平安時代に平氏伊勢平氏と平家の繁栄を願い、厳島神社に奉納された経典類の総称。