Nam Myoho Renge Kyo
What he should fear is slander of the profound Dharma as well as
companions who are slanderers, for those will surely cause him to fall
into the frightful Avichi Hell... I hope my disciples will ponder
this matter, cutting short their sleep by night and curtailing their
leisure by day. Do not spend this life in vain and regret it for ten
thousand years to come.
The Problem to be Pondered
Day and Night;
MWND, Vol. 5, p. 169 - 173
Nam Myoho Renge - Kyo