It is said in the “Medicine King Bodhisattva” chapter that a bodhisattva called Issaishujōkiken (Gladly Seen by All) learned the Lotus Sūtra from the Buddha Sun Moon Brilliance. With deep admiration for his master’s favor and the value of the Lotus Sūtra, he made offerings of thousands of invaluable treasures. Issaishujōkiken felt that this was not enough, however, and proceeded to anoint his own body with oil, set it aflame, and continued to burn it like a lamp wick to venerate the Buddha for twelve hundred years. Thereafter, he burned a light on his elbow for seventy-two thousand years to venerate the Lotus Sūtra. Thus, if a woman venerates the Lotus Sūtra in the fifth 500-year period after the demise of the Buddha, during the Latter Age of Degeneration, the Buddha will bestow upon her all merits of the Lotus Sūtra just as a rich man gives all his wealth to his son.

Nichinyo Gozen Gohenji, Response to My Lady Nichinyo, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 132-133