This letter is dated the third day of the ninth month, with no year indicated, though it is believed to be 1275, a year and a half after the Daishonin’s return from exile on Sado Island. It is addressed to the lay nun Sennichi, the wife of Abutsu-bō.

The letter is a reply to a question the lay nun has asked about the effects of different degrees of slander against the correct teaching. The Daishonin says, “If a believer’s offense is slight, overlook it, and lead that person to obtain benefits. If it is serious, encourage him to strengthen his faith so that he can expiate the sin.” But attention should be paid to his warning, “Even minor slanders may lead to serious ones, and then the effects one must suffer would be far worse.” The Daishonin praises the lay nun Sennichi for asking a question about slandering the correct teaching.

https://www.nichirenlibrary.org/en/wnd-1/Content/74