However, there is no evidence to support this legend other than that it was mentioned by Hakuin in "Enmei Jikku Kannongyo Reigenki" (The Wondrous Power of the Kannon Sutra for Long Life in Ten Statements).
しかしこの伝説は江戸時代に白隠が『延命十句観音経霊験記』に述べている以外に裏づけがないようである。