This discourse was taught by the Blessed One, taught by the Arahant, the fully enlightened Supreme Buddha. This is as I heard,
“Monks, live contemplating impurities of the body. Let mindfulness of in-and-out breathing as a basis well-established in you! Live contemplating the impermanence of all conditioned things. ”
This is the meaning of what the Blessed One said. So, with regard to this, it was said:
The tendency to lust after beautiful objects is abandoned in one who lives contemplating the impurities of the body. When mindfulness of breathing is well-established, stressful and unwholesome thoughts do not exist. For one who lives contemplating the impermanence of conditioned things, ignorance is abandoned and the true knowledge arises.
Focusing on the impurities of the body, being mindful of in-and-out breathing, ever ardent, and seeing the cessation of all formations: Such a monk sees things rightly and is, thereby, well-released. Accomplished in the true knowledge, that peaceful sage overcomes all bonds.
This, too, is the meaning of what was said by the Blessed One. This is exactly as I heard.