A Well-Guarded Fort
315. Like a well-guarded frontier fort, with defences within and without, so let a man guard himself. Not a moment should escape, for they who allow the right moment to pass, suffer pain when they are in hell.
Sacred Books of the East, Vol. 10: The Dhammapada and Sutta Nipata,
by Max Müller and Max Fausböll, [1881], at:
http://www.sacred-texts.com/bud/sbe10/sbe1024.htm