On Sept. 12, 1271, the military government at Kamakura arrested Nichiren arbitrarily and took him to the place of execution, called Tatsu-no-kuchi (“the dragon’s mouth”). When one of his assailants found scrolls of the Lotus Sutra in Nichiren’s pocket, he hit Nichiren on the face with one of them. Nichiren realized that this scroll was the one containing [Chapter 13, Encouragement for Keeping this Sutra.] At first he felt humiliated at being struck in the face, but when he realized which scroll it was, he rejoiced instead. By coincidence, he was being beaten by the same scroll which predicted such a fate for one who propagates the Sutra.
Introduction to the Lotus Sutra