1" … leads to the destruction of the taints.

"And how, bhikkhus, is concentration by mindfulness of breathing developed and cultivated so that it leads to the abandoning of the fetters, to the uprooting of the underlying tendencies, to the full understanding of the course, to the destruction of the taints?

"Here, bhikkhus, a bhikkhu, having gone to the forest, to the foot of a tree, or to an empty hut, sits down. Having folded his legs crosswise, straightened his body, and set up mindfulness in front of him, just mindful he breathes in, mindful he breathes out … . sn.v.341 He trains thus: ‘Contemplating relinquishment, I will breathe in’; he trains thus: ‘Contemplating relinquishment, I will breathe out.’

"It is in this way, bhikkhus, that concentration by mindfulness of breathing is developed and cultivated so that it leads to the abandoning of the fetters, to the uprooting of the underlying tendencies, to the full understanding of the course, to the destruction of the taints."

sn.v.342

1" … Āsavānaṁ khayāya saṁvattati. Kathaṁ bhāvito ca, bhikkhave, ānāpānassatisamādhi kathaṁ bahulīkato saṁyojanappahānāya saṁvattati … anusayasamugghātāya saṁvattati … addhānapariññāya saṁvattati … āsavānaṁ khayāya saṁvattati?

Idha, bhikkhave, bhikkhu araññagato vā rukkhamūlagato vā … pe … paṭinissaggānupassī assasissāmīti sikkhati, paṭinissaggānupassī passasissāmīti sikkhati.

Evaṁ bhāvito kho, bhikkhave, ānāpānassatisamādhi evaṁ bahulīkato saṁyojanappahānāya saṁvattati … pe … anusayasamugghātāya saṁvattati … pe … addhānapariññāya saṁvattati … pe … āsavānaṁ khayāya saṁvattatī"ti.

Dasamaṁ.
Dutiyo vaggo.

Ānāpānasaṁyuttaṁ dasamaṁ.