長阿含經 28.p76

28.p76

“What’s called the certain explanation? I explain the truth of suffering … formation of suffering … cessation of suffering … truth of the escape from suffering. Why is that? These things are compatible with the teaching and meaning. They are leaders of the religious life, dispassion, the unconditioned, cessation, calming, right awakening, the ascetic, and Nirvāṇa, so I teach these certain explanations.