Pāli · Sutta Piṭaka (Pāli, Mahāsaṅgīti)“Tenahānanda, suṇāhi, sādhukaṁ manasi karohi; bhāsissāmī”ti.
“Evaṁ, bhante”ti kho āyasmā ānando bhagavato paccassosi. Bhagavā etadavoca:
“kathaṁ bhāvito ca, ānanda, ānāpānassatisamādhi kathaṁ bahulīkato mahapphalo hoti mahānisaṁso? Idhānanda, bhikkhu araññagato vā rukkhamūlagato vā suññāgāragato vā nisīdati pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā.
So satova assasati, satova passasati …pe…
‘paṭinissaggānupassī assasissāmī’ti sikkhati, ‘paṭinissaggānupassī passasissāmī’ti sikkhati. Evaṁ bhāvito kho, ānanda, ānāpānassatisamādhi evaṁ bahulīkato mahapphalo hoti mahānisaṁso.
English · Bhikkhu Sujato“Well then, Ānanda, listen and apply your mind well, I will speak.”
“Yes, sir,” Ānanda replied. The Buddha said this:
“Ānanda, how is immersion due to mindfulness of breathing developed and cultivated so that it is very fruitful and beneficial? It’s when a mendicant—gone to a wilderness, or to the root of a tree, or to an empty hut—sits down cross-legged, sets their body straight, and brings mindfulness to the present.
Just mindful, they breathe in. Mindful, they breathe out. …
They practice like this: ‘I’ll breathe in observing letting go.’ They practice like this: ‘I’ll breathe out observing letting go.’ That’s how immersion due to mindfulness of breathing, when developed and cultivated, is very fruitful and beneficial.